I just sold a restored unit for $1250. Unfortunately we have people that will pay that much for an unrestored one. I can see spending $750 for one in mint condition with a wood cabinet and original boxes, but we are seeing people paying crazy money for units that have 40 year old capacitors. It is supply and demand, but its also the excitement of having a nice looking unit, and can be restored at a later date.
The unit i sold had the original filters in mint condition on the outside and checked out fine from what i remember. I think i compared the AC across them to my restored 2325 or 2275 units. It had all new elna silmic capacitors, new diodes and electrolytics were upgraded to films. Anyhow, i also gave a one year Warranty on the unit. The same unit was sold a month later and the seller only got $850 some bucks for it. I wish i would have known that he was selling it earlier and i could have helped him with his sale by providing a warranty transfer to the new buyer, but after i saw that he lost his butt on it, i figured the new buyer got more than a deal on it.
So i will say that some sellers really use words like "very nice" and Restored and Serviced to con people into buying stuff that has rusted screws and marks and flaws hidden by out of focus pictures or pictures of the new black face plate that somehow made the unit worth $700 more than it would sell for normally. its a crazy world out there.