Playtrade- a new way to buy (and sell) books

Anyone who's used Amazon over the last what- three or four years? Should be familiar with Amazon marketplace- their system for buying and selling used books. I always thought Play.com, while a fabulous site (free P&P, people!) was missing a trick by not having anything similar. But now they have! Playtrade has many of the same features of Amazon's Marketplace, but only approved traders with a track record in book sales can sign up to sell stuff at present. (I would think this will change pretty soon). I think prices will need to come down soon, too- When Play is offering a book at £1.99 including shipping, I can't see that Playtraders offering the same for £6.88 are going to get much business... but it's early days, and I see potential!