A local mower shop has a used MTD Pro 54" hydrostatic walk behind for sale for $500. It has a 20 HP Kohler on it, and it is a 2000 model 2054F. The catch: It has not been run in a year, and it currently won't start (he says it has water in the gas and needs a carb kit). It is missing the safety levers on the handles for the engine kill switches, but otherwise seems to be intact. Is this worth looking at? I am not stupid enough to plunk down $500 without at least turning the motor over and checking to make sure that it has compression, but there are a lot of other things that could go wrong. Oil did not look milky or excessively dirty. It needs belts on the deck - getting a little frayed. What else do I need to look for? Any way to check the hydrostatic unit without running it? If it has sspark when I turn it over, should I be able to get it to start briefly by squirting some starting fluid down the carb throat? Do you all think it is worth the gamble? Thanks in advance for your insight!!