I too was wondering which ones are good out there. I read about the Exergen ones that people recommended and I found this site that give a $5.00 mail in rebate if you buy one... Just thought I would pass the link along to you, or anyone else thats is going to buy on and wants to save $$$...
http://www.exergen.com/medical/TAT/tatconsumerpage.htm
You have to click in this paragraph on the right to get the rebate:
If your pediatrician has run out of TAT-2000C Educational Pamphlets, just click here or on the image of the pamphlet below and download a full copy, including the rebate coupon.
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Walmart has it for $29.82 online right now:
http://www.walmart.com/catalog/product.do?product_id=3936091
Sams Club (online) $28.46
Walgreens $49.99 (if you wanted to spend more money...lol)