I just came across a post on the OLPC News blog lamenting the fact that a XO-1.5 showed up on Ebay:
Recently, the first XO-1.5 to appear on eBay sold for $316. This my friends, is a travesty.
The XO-1.5, with a 1Ghz processor and 1GB of RAM, is a solid upgrade from the XO-1. Yet this sale is disappointing when unused XO-1 are selling for over $300 each. I was expecting at least $350 for the XO-1.5 - it has a Sugar / Gnome dual boot, what so many USA geeks wanted so they could use Linux programs instead of Sugar Activities. And with an eBay seller, you could actually expect an easy shipping experience.
I don't know what he's talking about; I think $316 is ridiculously overpriced. You can get a good laptop for that. This was supposed to be a$100 laptop, and 3 years later they still haven't managed to get the price down.
BTW, if you're wondering what the 1.5 looks like, here's a video of the XO-1.5HS.