Is that 100 dollars or 100 pounds.
I see you have already looked at Kenoms 120mw Dorcys he has for sale, In my opinion these are very cheap for what they are, he is even offereing a 6month warranty, all for only about $110.
If you want, when i recieve mine i will do a full indepth review for you, however i am in the UK and therefore the shipping won't be too quick.