I have one exactly the same. I would be thinking about 150 to 200.make sure the seals are good. I had to play with the plumbing and strip it down and clean it. But they are well built and come apart easily. Bought a stainless sparkler from keg king. What's the asking price on that one.
Edit. Also looks like the clamps to lock it onto the bench are missing. So harder to set up.
He said he paid $245 wanted $190 now will take $150 delivered. Thinking of offering him $100 and see what he says. Have only seen the pics so don't know about seals.
Got the guy bringing it round for a squiz tomorrow which seals should I check never really had much to do with them. Thought I'd offer him $100 he seem pretty keen to get rid of it.
Go for it, $150.00 delivered is IMO a steal.
Sort the possible seal issue out later,although reconditioning it would be wise,again at $150.00 grab it !
I tried to buy one of these from a UK ebay seller a couple months ago and the asking price was 300 Pounds. including shipping all up was around 400 pounds so I recon you have an absolute bargain!