I bought a 2006 open station 3320 eHydro a little less than a year ago with 300x loader, 61" HD bucket, and a 447 backhoe (24" bucket) with 185 hours on it for ~$21,000. The only thing I would change would be to put
R1 tires on it rather than the R4s it has, and put a smaller bucket on the backhoe. I replaced the battery about a month ago, and both hoe stabilizer cylinders weep fluid ever so slightly. I have right at 340 hours on it now, and I am well pleased and would do it all again. Oh, and I bought it from an individual not a dealer, although it was on a dealers lot.
When I purchased the tractor the dealer and the seller told me I had whatever was left of the three year powertrain warranty, so I am surprised to hear that the tractor you are looking at has no warranty. Is it because the unit was a rental? I also believe that the fuel injection system components are warranted for longer, they are covered under pollution control devices I think.
As for price, I think I got a good deal. Except for the hours on the meter the tractor could have gone for brand new sitting on the lot. Having said that I would not necessarily say you are paying too much, but I will say I got a better deal in my opinion.