Right now there is a 2009 Prius currently looking for an opening bid of $300 on the city of Houston's surplus site. Runs but missing fanbelt. Practically mint.
https://www.publicsurplus.com/sms/houst … uc=3516333
Look up the City of Houston's public auction pages and go roll the dice in the salvage yards. They post a list every week of the cars and if you see one that looks promising, dive in. Go on rainy days when people want to stay home instead of wander a yard full of cars. You might need to wrench on it, but that's kind of the beauty of Lemons is learning how to do so with junk you spent very little on.
Don't get your hopes up with newer cars and Toyotas and Hondas. People can resell those and the bidding war will put them past $500.
https://www.houstontx.gov/police/auto_d … uction.htm
Or you know Craigslist and take your chance that this is real and not stolen.
https://houston.craigslist.org/cto/d/co … 79931.html