Well, it's not necessary a "bargain" per se, since it's FREE:
http://slickdeals.net/forums/showpost.php?p=32692851&postcount=1492
I have several of the similar version with backlight. It's quite a decent MM, especially considering the price. :)
Ins't that just a scam like all of those fake PS3 coupons floating around all over the net?
HarborFreight has free trinkets all the time to get people into stores.
They had this on sale for $2, so it's not quite like a free ps3.