websites to sell your car but do not charge for you to sell?

…?… questioned:

im tiresome to sell my car .what websites can i post it up on but do not payment me. any ones additional than ebay or craigslist. i live in chicago if it depends where i live.

If I do my own maintenance on a new car, will that void my warranty or make the car unsellable?

airforcewolf16 questioned:

For model, if I do my own maintenance, I will have no service records. Will this void my warranty or make me powerless to sell my car in the possibility?