I had a rear wheel drive version of this that was from about 2002. I felt that I used it an awful lot since I have a 2/3 acre yard. My tires were not that worn out after over 10 years of use. Not a fan of front wheel drive mowers as they seem to wear out their drive wheels rather quickly.
I have no idea what the market value is for this, doubt I would want to pay $70 for it though. That said I am sure there are people here that know exactly what its worth.