Fireball,
Just fyi, I know we pulled an 18ft glasstron boat to the lake in 1970's (a couple times) with a VW beetle (boat was probably 3x if not more weight and mass than the car... but it was in rural areas, and we stayed away from "sudden" traffic conditions, and it was years ago. BTW!!! I am not saying it probably wasnt risky, or saying you should do it. But with a decent tow vehicle, and proper care while driving (taking the backroads, staying away from heavy-traffic-at-high-speeds) you should make it home FINE, but just be dang carefull.
since I assume you are buying, to take home I sugges you take a jack that is easy to use, jack wheel or side off the ground check bearings at least that they spin easy no obvious noises (unless seller says things been serviced) plus a couple spare tires. Nothing like buying trailer tires, in the middle of nowhere and you are desperate, been there done that.
then when you drive, get out and check for heat from wheels at bearing (carefull it could get really hot if something is up) after a few miles (say 50?).
Good luck.