I've read the book by the guy that traded the one red paperclip for a house. I hate the whole culture of "inspirational/motivational speakers" and power of positive thinking hooey, but there are some incredibly practical insights that this guy throws out.
Trades are meant to cut thru the whole b.s. of Dollar Values or the holy grail of "Making A Profit". One of my favorite trades took place last summer at a gun show where I traded a guy a nice osage self bow and a dozen arrows for an Ithica Model 49 .22 with a broken extractor and pitted out barrel (his pricetag including a greedy markup was $65) I still feel like I got the best of the deal because it looks almost exactly like the one I carried when I was a kid. Both of us got what he wanted, both think they got the best of the deal.
Don't be shy Hawkeye, whadya want, whadya need, whadya got?