As usual Gordon's points are solid.
If you don't do the work yourself, it may be wise to scout your area for folks who can keep the car alive. It's been my experience, depending on the builder, car may be a newer build but some components and general technology are old. Expect a level of maintenance and costs associated with any old car.
Like a lot of the other posters here, I've owned a few cars for playing. Hands down, these funny little clown cars rate way up there on the fun stuffo meter.
Best of luck in you search.