OK, I feel like a total shill for cowboom, but their ereader prices are getting ridiculous.
The PRS-350 (which I personally love as an ereader) is down to $29.99 + $5.24 shipping + tax in most.
If you prefer the Amazon's ecosphere,
then they have the Kindle 4 (non-touch screen w/special offers) for $39.99 + $5.24 shipping + tax in most (I know there have been some better deals for new ones recently with the Amazon Visa).
Again, these are pre-owned product from Best Buy (which could be display models or returns), so check the product grade (I saw some "7"s in the PRS-350 stock, which means they are free from obvious scuffs or scratches). In any event, they should be fully functional and are backed by a thirty-day easy return policy.