https://detroit.craigslist.org/wyn/cto/d/detroit-1970-buick-electra-225/6892147660.html 1970 BUICK ELECTRA ''225'' CONVERTIBLE - $12900 (DOWNTOWN BUSINESS DISTRICT) hide this posting image 21 of 24 1970 BUICK ELECTRA condition: good cylinders: 8 cylinders drive: rwd fuel: gas paint color: custom size: full-size title status: clean transmission: automatic type: convertible 1970 BUICK ELECTRA ''225'' CONVERTIBLE. 455-C.I. BIG BLOCK V-8, AUTOMATIC TRANSMISSION. CAR RUNS AND LOOK GOOD. NICE CAR. SHARP MAROON METALLIC PAINT. CLEAN BLACK VINYL INTERIOR. DECENT CONVERTIBLE TOP. PASSENGER COMPARTMENT FLOOR PANS SOLID, RUST THRU IN TRUNK FLOOR AT MOUNT BOLT AREA(SEE LAST TWO PHOTOS), COMMON AREA FOR 69 AND 70 ELECTRAS. PRICE: $12,900. FIRM
Looks like a pretty good deal for the last year Electra convertible; - these were very nice cruisers, and you'll never get a convertible cheaper than one of these.
My (salt free) Wildcat had rust in the trunk in the same spots. A design flaw allows damp dirt to accumulate in the area where the chassis mounts are located behind the wheel wells. I had to repair mine to pass inspection for plates. It isn't realistic to expect to find a full size of that era without some corrosion if driven in salt or not. Still a good car for the money.