I got my Opal female and my Lavender male for $20 each at the Expo here last October. I think if you had a show near you, that would be the best place to get one relatively cheap. If you can't get to a show, then my next suggestion would be to find a reputable breeder near you or that can ship to you and go from there.
As far as morphs go, what BAH said is true. There are tons of morphs out there, many of which are becoming common enough that they are affordable for the lower end budget. Good luck with your hunting!