1/18 Scale(only the 87 GN/GNX have been out of box)
1987 GN $250
1987 GNX $150
1986 T-Type $100
1985 GN $150
1983 GN Prototype With Molly Signed Litho $200
1986 T-Type(black/red interior) $75
1987 WE4 $125

Hot Wheels
If I recall there are between 16-18 cars all for $80
There are Blue Kmart car, first run, and a "Budweiser" custom paint from Ebay..

Johnny Lightning
1987 GN(Classic Gold $15, Classics USA $15, Auction Insanity$15)
1986 TType (Calender Girl $15, Classic Gold$15)

Tiger Wheels
1987 GN $30
1987 GNX $30
or $50 for the set...

Motor Trend(Racing Champions)
1987 GN (Black) $25
1987 GN (Silver) $15
1987 GN Target $40

Collectables
GNX Hardbound Book from GM (unnumbered) with opened box $150
GNX Lithograph(GMP) signed by Mike Doble $75
Grey Turbo Buick Steering Wheel $65
Various magazines: Hemmings Muscle Machines, GM High Tech....

Have more to update and pics within 13hrs(at work)

PM me and I can give a ship quote....