I have seen them sell for $18k up to $22k
I would trade straight up for the right car.
The y88 is the special edition package, consists of solar gold, also known as the reverse bandit, only available in 78, just a little over 6k were produced with my options. If you look closely you will notice, gold headlamp bezels, black windshield and rear window trim, large bird on sail panel, pin stripping just like the smokey & the bandit car, gold instrument panel inlay, gold shifter bird.
I have PHS documentation for the car proving its a y88. They had the olds 403 or the pontiac 400 engines, mine has the 400. Wish it had the manual trans then it would be worth big big bucks.
I changed my profile name to 99ssconv as I have used this on the Trans am forums and others.