Where is the best price on L91's?

[Bluehinder]

Been shopping around after seeing reference here to some paying $1.00 each. Can't find them for less than around $2.

Any good places to buy?

What's better to get, E2 or Ultimate?

 

[Marduke]

Sam's Club is $1.67 each. eBay bulk is ~$1 each, but I recommend not using those cells in pairs (single only).