I know there have been a lot of Amazon "deal" threads lately. I'm sorry if they're getting old. I just ordered the Porter Cable 557 Plate Joiner for 159.20. It ships for free and there's a $30.00 rebate on the joiner as well. If you scroll part-way down the product page there is a link to add an assortment of 1000 biscuits for free.
129.20 is a pretty darn good deal for this tool - especially with the free biscuits. I think the average selling price for this is 199.00 or so.