NCIX (canadian computer retailer) has sets with 4xAA, 2xAA and charger for $15. Surprise special, 1 per customer, while quantities, etc etc. If you can do a pickup to avoid shipping costs, this is a pretty good deal.
http://www.ncix.com/products/index.php?sku=61653&vpn=ECH420&manufacture=Sanyo&promoid=1337
Edit: sold out.