if u get a bill. there where i come from it doesn't matter as long the gaming cards were not overclocked. If they were half price i wouldn't mind and buy. Otherwise it can be risky.  but you got to look: If u get 4 instead of 2 and they give you 2500 kH/s instead of 1250 and one of these dies after 1 month, it was worth it. On the otherhand also 3 could burn in this time. I would only risk at 1/2 price.