Electric Garden Tractors
 

If you go to Craiglook.com and search Electric Tractor, there are three E-Trac General electric tractors one seller has 2 for $300 - they will need work and batteries as they have not been used for a long time. The other is working (seller says) and is asking $600. These seem to be the tractor of choice and are highly regarded. I would buy the two, but my cash flow does not stretch that far.

I've also heard great things about the elek-tracs. I know Ben Nelson has one and he seems to like his. I don't recall how much he paid, but I know hes put work into it. They are getting a bit old too since they were made in the 70s.