<font color="blue"> some used backhoes sell in the $6,000 to $8,000 range </font>
I see the big Case 580's and the Deere equivalents all the time at auction and they seem to bring $10,500 up to $13,000 consistently with most of them in the $11,200 to $12,500 range. I'd think you could buy one, use if for what you need and turn around and sell it without losing much if anything. I bet if you didn't incur any repair expenses while you had it then cleaned it up and put some fresh paint on it you could probably make money on it.
Of course, to be fair, I do that kind of thing on a regular enough basis I tend to think anyone can do it. Even if you buy at the high end, sell at the low end and spend a couple grand on it while you have it you're still thousands ahead of the $10,000 to have it done. Besides that, you get the satisfaction of doing it yourself and can probably find some other uses for a machine like that while you have it besides the pond.
Good luck with whatever you decide. I hope this helps. /forums/images/graemlins/smile.gif