Rather than a knockoff intended for a toy you might try scanning the equipment exchange here for a great deal on a used one.
One of my buddies got scammed a couple years ago buying an M500 on eBay. The seller assured him that it was the real deal-but when it arrived it was a Taiwanese airsoft knockoff piece of crap. I found out about it when he called me asking if he could borrow a replacement bulb assembly-because his "didn't seem bright enough"
He had no idea that he got had been scammed-until I compared his to one of mine.
To make matters worse, this M500 was intended for his duty carbine-he's a police officer. I loaned him one of mine until he got the mess sorted out.
It wasn't bright enough because it was a high priced toy intended to do nothing more than look cool