I have not had any experience with this seller or this specific module. However, in the description the seller states that the module contains a "long die open can" laser diode and that it is "extracted from [a] new(never used) DVD Burner". Additionally, the seller states that "the ideal use of this open can diode is 250mW CW at 420mA". While I can't confirm it for sure, this description sounds extremely similar to the LPC-815 laser diode. You can buy or build a LPC-815 module for a lot less than the $41 ($36 module + $5 shipping) the Ebay seller is asking. For the most part you will get the same performance out of the LPC-815 diode as you will from the Ebay module.
Otherwise, the seller has a 99.8% feedback rating with over 2000 transactions, so I see nothing wrong with buying the module from him/her.
Hope that helps