There are several makes and I'm sure everyone has an opinion as to what's better than what. Lilliput and Xenarc are two of the bigger names that come to mind but there are several others. If you get a good deal on eBay for a new monitor, go for it. I wouldn't buy a used one unless you get a really good deal.
By the way dude, your grammar and spelling are terrible. Maybe re-read your post before you submit it (if English isn't your first language I guess you can be forgiven )