I dropped my car off to get blasted and new sheetmetal hung. I had a guy call while the car was at the shop asking if I was willing to sell the wheels off the car. I told him that I didn't know how much they were worth and that if I did sell them I would have to round up some more wheels and tires to roll the car around on. They are in decent condition about a 7 or 8 out of 10 with only one having some minor curb rash. What would these possibly be worth?

http://i9.photobucket.com/albums/a91/fish451983/105_0543_IMG1.jpg

Don't know what size (didn't see it in your post) or if these are originally from a Camaro, but I've seen 15 x 7 GM sets with the Monte Carlo stampings go for $300 to $400 (including caps and rings and descent tires). I've also seen new 15 x 7 repros with rings and caps for $349 all day long on sleasbay.

How can I tell if they are off a Camaro or Monte Carlo?

Look around the valve stem hole. The will be a 2 letter code to the right of this hole. There may be numbers to the left and right of the hole.

The 2 letter code tells you the application. MonteCarlo wheels are stamped FW