Just got a PRS-600BC as a gift, but am quite satisfied with my PRS-505
I was tempted to open it up and take it for a spin, but decided not to sully it! I'd also entertain trade offers... I'm currently looking for gift cards to Cabelas, which you can usually get cheap from credit card rewards... Shoot me a PM with whatever trade item you got -I might be interested!
... I might be willing to ship internationally as long as it's not too much $ and hassle.
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Here's my ebay feedback 100% - 149 transactions buy and selling.