I've traded all of my cards for others, but I looked up book values first and only made reasonable offers. When you package together your ****** cards you can always find someone to take them, which has amazed me. I also traded the only 1952 card I redeemed ($60 bv W. Terwilliger) for a $25 A. Pafko autograph, but I figure the condition of the '52 would have been no more than half the book value, while the auto is probably mint or close to it. Also, the auto brings with it free shipping so now I can get all my cards shipped for free when I have them shipped.
But yeah, I get a lot of horrible offers which make me laugh.