If you aren't bothered by something being too old, you can also check on Gumtree, which is a free site in which to sell/advertise goods, services, etc. I had always driven a manual (after way too many lessons) and found a car in the right price bracket that happened to be an automatic (I wanted to spend around £500-so not a lot!) and it was a 1993 VW Golf. But then I'm not interested in how it looks (totally fine but if you're into cars, you'd probably think it was a bit crappy), I don't drive a ton (needed to move from Norwich to Liverpool and that was all I was really hoping for). In this case, the automatic was nearly the same price as manuals I was looking at, but then the car is old, it had 90,000 miles and I wasn't too particular. The guy I bought it from was completely genuine, very nice and I have been very pleased (and driving an automatic in the UK has been something of a revelation....)