Edwards E2M28/30

Hello guys,

I can buy a Edwards E2M28/30 pump for €500. The guy says he doesn’t know the condition of the pump. Some of them work some of them don’t.
Is it a good pump to do infusion with ?
How much does it cost to rebuild (overhaul) the pump ?
Is it a good price even if the pump doesn’t work well ?

If someone is interested, he has 10 pumps for sale.