some pple are selling the k-x body only for 400+ in buy/sell. have to check the physical condition before determining if its a good buy though.
a good condition red one might fetch a slightly higher premium.
last i recall, the DAL 18-55 shouldn't add more than $80 to the price.
if u are familiar with the canon 550d, u might want to consider the K-R instead, even if it costs more. the k-x is a little too basic imo. one feature that used to bug a lot of pple is the lack of visible AF point indicator in the viewfinder, so even though there are 11 AF points, u won't know which one is being used on 11-point auto.
most users end up setting center AF point and re-composing to get around this.