From: Hemmings Motor News
Date: March 1989
Price then: $15,000 ($28,000 adjusted for inflation - about the cost of a new 2015 Buick Encore today)
Price now: $53,100-$112,000
Approximate dollar difference: $83,000 (assuming No. 1 condition)
Approximate annual rate of return: 5.3%
Buick: 1971 GS Stage I conv, total production 81 cars, Rally-Pac, suspension, pdb, Turbo 400, matching numbers, Protect-o-plate, one owner, 60,000 miles, very fast and extremely rare, $15,000
It really doesn't get much better than a Stage I 455 equipped Buick. Good horsepower and enough torque to stop a planet's rotation makes this the one car that Buick enthusiasts desire. This particular car has it all, the best engine you could buy in a Buick and a convertible top. Although $15,000 certainly wasn't cheap in 1989 money, the new owner really found a gem.