no need to spend much on keychain lights. even 1 year after its market release people are still going crazy about the E09. people who bought it months ago continue to buy more (for themselves as backup or spare parts reservoir, or as gifts). it is an all time pleaser. and much brighter than the Worm or ITPP, LD01 R4 or similar lights. set the ITPP and Worm aside, earn a DD coupon code (6$ for a reseller ratings review), and buy the E09 instead, trust the keisler :)
Paying 20$ for the 1xAA body is over priced; it's what i had paid, argh. Dealer's cost price (goinggear, etc) of this item is 8$ (estimated), factory production cost 4$ (estimated). Imho, a fair price for us budgeteers would be something around ~8$, plus shipping.
This is BFL. Don't support overpriced flashlights or parts. :D