What are my wheels worth?

[demon700]

I have a set of 20 inch dodge ram rims off my 2006 1500 Sport. I have them listed on kijiji here in NB, and havn't had much luck. The chrome is excellent on them, but the lip of the rim is starting to corrode a bit on all four wheels. The rubber on them isn't much good, but I am selling them with extra tires that would easily get another season out of. I was asking 600 until I realised how corroded the lip was, so now I am asking 500, is this unreasonable? What do you all think is a reasonable asking price?
heres the link to the ad
http://saintjohn.kijiji.ca/c-ViewAdLargeImage?AdId=303252955