Of the sale items, Oathbound: Arena, Into the Black, Into the Blue, Out for Blood, Doomstriders and Torn Asunder are 3.5. The others are 3.0, although most were largely unaffected by the conversion. If you're hunkering for a 3.5 version of some of the older titles, they are available on pdf through the website or rpg.now. I don't think that the pdf's are on sale though.