Google's anointed Android tablet is a pretty good deal even when you buy it at retail, but there's a solid deal for the Nexus 10 on eBay right now if you don't mind refurbished hardware. This is the 32GB variant of the tablet, which usually goes for $499. So this deal saves you $110.
The device is an official Samsung refurb, and is listed as being "like new." The warranty is only 90 days on refurbished units, but it's otherwise the same device you'd get from Google Play.
As with most eBay deals, this one is subject to limited stock. Make a call, folks.