Thanks for all your help guys, I really appreciate it
I've been taking a long hard look at the feedback this guy has gotten from other Ebay members and I have to admit the 943 positive comments to 0 negative comments is hard to ignore (and also he's based in China, where the laser comes from).
I think I will take a risk on this one, given the low price of $16 I won't be too annoyed if it's a fizzer as some of the above were, but hopefully there won't be any problems with it.
I'll be sure to tell you how it goes
Thanks again,
Andrew