Boof that's a real shame mate - as you know Staff's are high maintenance items , they have ADHD I think at birth and need constant almost 24hr stoke ups & training .... looks like the previous owners may not have given 100% to either .... other big one is that it takes very little to get them to wound up again as you'd know.
Hope it all pans out sweet mate really do - I couldn't go to a pound I'd want to liberate them all ... breaks my ticker just thinking about that