The Friedrich Schleiermacher Collection on Community Pricing is close to $10, with the bid for $15 (and $20) being well over 100%. We could quite easily lower the price if some people bidding at $15 and $20 dropped their bid to $10 before Friday when the bidding closes.
http://www.logos.com/product/29828/friedrich-schleiermacher-collection
Further, Wittgenstein's "Tractatus Logico-Philosophicus is on the brink of $4; just needs a few more bids!
http://www.logos.com/product/30708/tractatus-logico-philosophicus
Lastly, though it is less likely than the ones above, there is a possibility of the Classics in Empiricism Philosophy Collection coming down to $20 as opposed to $25 before Friday (currently the bid at $20 is at about 90%).
http://www.logos.com/product/29822/classics-in-empiricist-philosophy-collection
