Do the center caps have a company name on them? They look like they might be 14x7 for all four? 15" are harder to find used.
Slotted mags in general are hard to find used. I would say list them at $150-$200 since they have tires and leave room for bargaining down. I've seen them on Craigslist for $100-$200 for a set of four.
Weird, now that I look, there are several sets out. Last time I checked like a few weeks ago I couldn't find any.
This guy has has 9 rims for $250 but if it's the guy I think it is a couple of the 15" rims have the lug holes all rounded out like the lug nuts weren't on and they did burnouts with the tires and the holes got all chewed out. If it is the same guy.
http://boston.craigslist.org/sob/pts/4113608164.htmlThi guy has 4 for $175.
http://boston.craigslist.org/sob/pts/4137744519.htmlThis guy wants $400 for his set. No size listed. Another ad from June, no longer viewable, had a set of 15" Mopar rims for $300. If it's the guy I'm thinking of I got a set of 6 slotted rims from him for $120.
http://hartford.craigslist.org/pts/4115998794.html