I am a used car dealer and here are the recent auction prices for the last 6 months or so. Remember the area the cars are sold in also make a difference in price.
Along with color...seems red is fetching more. Which is alright with me. I have a red 06 Spyder.
03 Spyder:
06/28/07 MANHEIM Regular $46,400 10,013 Above BLACK
06/14/07 MANHEIM Regular $50,250 12,670 Above BLUE
06/12/07 FAAO Lease $43,000 28,710 Above RED
05/24/07 RIVRSIDE Lease $44,500 30,148 Above BLACK
04/26/07 RIVRSIDE Regular $46,500 22,950 Above BLACK
03/14/07 W PALM Regular $43,600 34,773 Above SILVER
04 Spyder:
05/31/07 MANHEIM Regular $57,900 3,741 Avg BLACK
05/31/07 MANHEIM Lease $55,500 9,278 Avg RED
06/07/07 RIVRSIDE Lease $59,000 5,234 Above RED
06/14/07 CHICAGO Lease $44,000 24,174 Below SILVER
07/05/07 RIVRSIDE Lease $43,500 28,966 Below BLUE
07/19/07 RIVRSIDE Regular $48,500 5,784 Avg BLUE
05 Spyder:
08/31/05 W PALM Regular $66,800 3,495 Above RED
02/14/07 W PALM Regular $55,600 23,566 Avg SILVER
03/22/07 MANHEIM Regular $58,750 9,923 Avg GRIOGIO
05/03/07 MANHEIM Regular $58,750 10,494 Avg BLUE
08/02/07 RIVRSIDE Lease $55,500 8,194 Avg GREY
06 Spyder:
01/16/07 BIG H Regular $74,000 1,065 Above NONE
03/29/07 RIVRSIDE Lease $69,000 6,654 Above BLACK
04/05/07 MANHEIM Regular $76,750 4,238 Above GREY
05/17/07 MANHEIM Regular $70,500 4,264 Above BLACK
Hope this info helps you out. It is possible that one of the local dealers to these auctions could have one of these cars for sale in your neighborhood. You know how much you can bargain with. But remember the condition is listed also. So the dealer might have some body work to do plus inspections. Always see the miles too. Obviously lower mileage cars bring more money. If you find a Spyder locally look at the mileage and see if it matchs the miles listed in the lists above. In most cases the dealer advetises the car with the same miles as listed when they purchased it from the auction. I have seen similar mileage cars listed on Ebay and the mark up is substantial. But then again we do have the right.

Jeff