pentax rebates

How can I sell a Pentax K100D you think?
I bought a K100D in 9 months for about $ 420 with rebates. Now view the new K200D. How much would a prefect condition K100D search eBay, you think? I understand the purpose of the kit. Yes, it's in perfect condition. Not even a scratch!
The best way to determine this would be to GOTO and search eBay completed auctions.
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