1 and 3 are the same cars, just a different body. You can buy parts for them, The local hobby store near me sells a million of them under the "Red Cat" name They are shit in my opinion but if you want something ready to run, new that works go for it. search the Albany NY craigslist and search red cat , i'm sure something will pop up if you are looking for used and super cheap. They are just a step above a toy I have spent a few hours at the carpet track getting one to work, and I did with different shocks/springs, installing droop screws etc. but i think you could get yourself a used associated tc4 and be much better off. for the same money. I did have fun making a cheap "toy r/c car" be faster than guys with big $ cars.
