August09, please use the edit feature on your posts, double posting is generally frowned upon; triple and quadruple posting even more so.
If no one has posted since your last post just add your additional comments to the original post.
I've got a question, which 7.5W laser/diode did you own and have for years prior to this Sanwu, just wondering?
BTW, Welcome to LPF!
PS - Your new reduced price is much more realistic, good luck with your sale. Besides the questions that have already been brought up, many members are going to be hesitant to purchase an expensive used laser from a brand new member, whose 1st post was this sales thread, you may need to give it some time.