The GeForce 8600 GTS will sell for $199 to $229, the GeForce 8600 GT for $149 to $159 and the GeForce 8500 GT for $89 to $129.
Here's a reminder about the specifications of these cards:
GeForce 8600 GTS: 256MB GDDR3, 675 MHz core, 1000 MHz memory. GeForce 8600 GT: 256MB GDDR3, 540 MHz core, 700 MHz memory. GeForce 8500 GT: 128MB to 256MB DDR2 or GDDR3, 450 MHz core , 700 MHz memory. GeForce 8400 GS: 450MHz core, 400MHz memory. Only for OEMs. GeForce 8300 GS: 450MHz core, 400MHz memory. Only for OEMs.