If the AC was working it would fetch around 1800 + on auction. If it's in the hands of a compitant guy that can fix for a couple hundred and win it for 700-800 then I would say that person has struck a result. Unless you know your stuff and can fix it cheap enough then it's a risk.Bit steep for a set with problems! It's amazing what people will pay on eBay. I miss the freeads there were some real bargains to be had if you were quick.
There was a guy that came on here that could fix inverters and quoted some prices if i remember?Who's the go to guy for fixing inverter stick / tig machines ?