Duracell Pre-Charged NiMH AA Battery 4-Pack for $9

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Infinite Surplus via Amazon.com offers the Duracell Pre-Charged Rechargeable NiMH AA Battery 4-Pack for $8.63 with free shipping.

That's a good price for four AA batteries of this type by a buck.

And:
BlueProton via Amazon.com offers the Sanyo eneloop Power Pack Kit for $29.99.

This kit includes a compact charger, eight AA NiMH rechargeable batteries, two AAA NiMH rechargeable batteries, plus four C and four D battery spacers. The spacers allow you to use AA batteries in C or D devices.