Not sure if this helps, but I bought the same model as yours about two months ago for $725. I was told that it is about 15 years old. Mine is in near pefect condition and came with a pressure regulator/dryer/filter and few hundred feet of hose.
I suppose that I could have got it for slightly cheaper. The guy was willing to dicker, but the regulator and hoses made the deal worthwhile for me.
I've heard both good and bad about Daytons. The previous owner told me that parts for Daytons are available, but they're not easy to find. Mine seems to be working fine so far. No compliants.