I have purchased a few tracks from Lucky Lion studios in the past for some personal projects (http://codeincomplete.com/) and been very happy.
I highly recommend them.
Good luck(y lion)!
I highly recommend them.
Good luck(y lion)!
http://codeincomplete.com/posts/2012/6/22/javascript_racer/
I would agree with the comments that you could charge more (certainly for the longer tracks)