Gateway EV900 is notoriously bad, I wouldn't buy one of those new or refurbished!
I've been using a refurbished Gateway EV700 for almost 3 years with no problems at all. It was half the price of a new one, but only had a 90 day warranty. Still, it cost less than a 14" monitor at the time, so I took a chance, and it paid off.
I wouldn't buy a refurb monitor unless it was from a local store, so I could go on a rampage if it failed after like 94 days. Shipping defective stuff back to online sellers is too much work and expense.