More car drama

I'm trying to buy a "new" car and get rid of my old car, but it's not working so well. The car I was going to look at this weekend was sold while I was out of town. And my car has been having progressively worse problems, so it may be very difficult to sell. However, I don't want to put ANY more money into it. At this point, it's getting ridiculous. Now that I finally got it starting consistently (which turned out to be a problem the last mechanic caused... but I can't prove it) it won't go into reverse without a TON of coaxing. :(

And it gets worse every day. I really don't know what to do. Seems like things are just stacking up against me. I can't drive what I have and I can't seem to get anything else at a reasonable price.