I took a look through your towns craiglist ads, this kart looks like a good deal: http://stlouis.craigslist.org/mcy/2420740075.html I think its actually a 1960's model that might have a higher value in the vintage collector kart market. This would be a great kart to just ride around on parking lots and stuff but it wouldnt be competitive racing at a track.
I looked up your old thread I'd posted on before, are you buying this kart to just ride on the street/parking lots for fun, or do you want to buy a kart to race at this track? -->http://www.slka.net/dnn2/Home.aspx
Also how much money do you have to spend on a kart?