This is odd...

I may be really nitpicking here but I was looking at this '88 GT on ebay and it has a color sceme from an '86-'87. It's black with gray ground effects. It also has gray diamond spoke wheels. I know for a fact that '88 GT's came in monochrome colors and the only color rims you could get were either black or gold (mine are black).

However his interior looks '88 as it has the gray and white dot matrix pattern for the trim bezels and the '88 seats. The VIN# has the J in it which means 1988.

http://cgi.ebay.com/ebaymotors/1988-Pontiac-Fiero-GT-66K-Original-Miles-MINT_W0QQitemZ330109838312QQihZ014QQcategoryZ6419Q QrdZ1QQcmdZViewItem

VIN # tells the story. Although it has the grey pre 88 wheels (no front wheel offset) and pre 88 paint scheme. I'd have to check out the car personally to see why those subtle changes were made before any bidding or purchase..