Elite Dealer

1977 MG MGB

$19,495

Vehicle Details

Make

Model

MGB

Year

1977

Mileage

23,967 miles

VIN

AMS38466

Body Type

Convertible

Transmission

Manual

Fuel Type

Gasoline

Description

1977 MG MGB that has sat in a climate controlled storage facility since it was partially restored. It was completely repainted a few yrs ago. The clearcoat was wet sanded and buffed to a mirror shine and ceramic coated.

No swirls or left over sand scratches. The paint is near flawless! The engine was completely overhauled with new seals and gaskets along with a new clutch kit 3 yrs ago. And runs like a top! I've driven this on many occasions over 3hrs away and it's never given me an issue! The interior is as good as it gets for being all original and being 47 yrs old! Yes, there are aftermarket wheels and new tires on it.

At the time, I wasn't planning on selling it. But that's what the car comes with. The stripe is vinyl and can be removed. Although it isn't 100% original... This car needs nothing done to it. condition: excellent cylinders: 4 cylinders drive: rwd fuel: gas odometer: 23967 paint color: red title status: clean transmission: manual type: convertible Please Note The Following **Vehicle Location is at our clients home and Not In Cadillac, Michigan. **We do have a showroom with about 25 cars that is by appointment only **Please Call First and talk to one of our reps at 231-468-2809 EXT 1 **

Classic MG MGB Buyer's Guide (1962–1980)

Full guide

Emily Chen

JDM Classics

1962–1980

~5 min read

Updated Apr 2026

The MGB is the best-selling British sports car of all time — affordable to buy, rewarding to drive, and supported by the deepest parts network of any classic import. Knowing which years to avoid saves you from an expensive restoration before you ever turn a wheel.

This guide covers

✓ 12-point inspection checklist

✓ Common issues & what to avoid

✓ In-person inspection guide

✓ Market pricing by year & condition

✓ 5 FAQs answered

✓ History & fun facts

Read the Full MGB Buyer's Guide

MG MGB Market Overview

Based on 70 MG MGB listings currently on ClassicCarsArena.com

Listed Now

$13,460

Avg. Asking Price

1956–1980

Year Range

Price Position on Our Site — Above Average

This car: $19,495

Low: $3,500 High: $40,895

Transmission Distribution

Manual 69% ◄

Condition Distribution

Excellent 17%

Good 6%

Fair 6%

Poor 3%

Data from ClassicCarsArena.com listings Browse all 70 listings →

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Classic MG MGB Buyer's Guide (1962–1980)

I came to the MGB through the back door — as a Datsun person who kept borrowing a friend's roadster for weekend runs up the coast. What struck me wasn't the horsepower (there isn't much) but the engineering integrity: a proper monocoque structure, all-synchromesh gearbox, independent front suspension, and a remarkably well-sorted chassis for a car designed in 1960. More than half a million MGBs were sold over eighteen years, which means parts availability is exceptional and the community is enormous. It also means the market is flooded with cars that have been poorly maintained, badly restored, or modified in ways that hurt both performance and value. Buying right requires knowing exactly what to look for.

What to Check Before Buying

✓

Sill structural test — Press firmly along both sills — any flex or softness indicates structural corrosion

✓

Floor pan inspection — Check from underneath; assess front corners at bulkhead and rear footwells

✓

Inner wing rust — Feel above front suspension turrets inside wheel arch for softness or holes

✓

Engine cold start — Should idle within 30 seconds; watch for blue smoke at startup (valve guides)

✓

Overdrive function — Test engagement at highway speed if fitted — should engage smoothly with rpm drop

✓

Wiring inspection — Check under dashboard for improvised repairs or non-standard wiring

✓

Boot (trunk) floor — Lift spare tire and inspect floor and spare well for rust

✓

Gearbox shifting — All four gears should engage cleanly without crunch or hesitation

✓

Temperature gauge — Drive to full operating temp — should stabilize around 80–90°C and hold steady

✓

Chrome bumper originality — Verify bumpers, overriders, and trim are period-correct for the model year

✓

Battery box condition — Check battery box under rear seat for acid damage and corrosion

✓

Hood / top frame — Test convertible top operation; inspect bows for breaks and weatherstrip condition

Common Issues

Sill rust is the primary structural concern and the MGB's most common serious problem. Because the sill is load-bearing in a unibody car, a rusted sill means the entire body lacks rigidity — doors will sag, gaps will open, and the car is genuinely unsafe to drive hard. Floor pan rust at the front corners and rear footwells is nearly universal on cars that have seen wet-climate use and is manageable but requires honest assessment of extent. Inner wing rust above the front suspension turrets is a more serious structural issue that affects geometry and alignment. The B-Series engine has an inherent tendency to run warm, and overheating — usually from thermostat failure or a clogged radiator — causes head gasket failure over time. British Leyland electrical systems of this era used a single-wire earth return through the chassis, which corrodes progressively; poor earths cause all manner of intermittent faults. The original Lucas electrical components have a deserved reputation for unreliability that can be addressed with modern relays and improved earthing.

What to Look For

Press firmly along both sills — the structural backbone of a monocoque MGB. Any flex, softness, or hollow sound indicates internal corrosion requiring major structural repair. Inspect floor pans from underneath, checking particularly the front corners at the bulkhead and rear footwells. Push your hand into the front wheel arches above the suspension turrets and feel for softness — inner wing rust here affects suspension geometry and is expensive to correct properly. Check the battery box area (under the rear seat on roadsters) for acid damage and corrosion. On chrome-bumper cars, verify the overriders are original — replacements are available but correct originals add value. Test overdrive if fitted: should engage smoothly at highway speed with a noticeable drop in engine revs. Check the wiring under the dashboard for improvised repairs — a consistent harness is important for fire safety on British cars of this era. Inspect the convertible top frame on roadsters for broken bows and correct folding action.

Price Guide

Chrome-bumper MGB roadsters (1962–1974) in driver condition trade at $12,000–$18,000; restored show-quality examples reach $28,000–$42,000 for the best early cars. The price premium for pre-1965 three-bearing engine cars is significant among purists — add 20–30% for correct early cars. Rubber-bumper cars (1975–1980) trade at a consistent 20–30% discount: drivers at $7,000–$11,000, excellent condition at $16,000–$22,000. MGB GTs (coupes) sell for 15–25% less than equivalent roadsters in the same condition — the best value in the segment. Project cars — running but rough — are available in the $3,500–$7,000 range and represent good value given parts availability. Beware "restored" cars with high asking prices and no documentation; a professional respray on a rusty car is common in this market.

Did You Know?

The MGB was in continuous production for eighteen years, making it one of the longest production runs of any sports car in history up to that point. Over half of all MGBs built were exported to North America, which is why U.S.-spec parts are the most common and least expensive to source worldwide. The MGB GT coupe was styled with input from the great Italian design house Pininfarina. When production ended in 1980, workers at the Abingdon factory staged a sit-in protest — the closure of MG's historic home factory was considered a national automotive tragedy in Britain.

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$19,495

1977 MG MGB

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Model History

How the MG MGB evolved (1962–1980) — 4 generations.

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