Read my post "Sad day to be a gecko" and you'll see my flying gecko experience.... I would not recommend buying one from a pet store if you ever see one. (i paid $50 for mine!, guess i got ripped off)
They are VERY difficult to keep alive in captivity, they are virtually all Wild Caught, and just fail to thrive most of the time. I`ve heard some people say they are great if you can keep them alive.
I had one awhile back, cool geckos but WC and generally have parasites. Once you remove the parasites, they can make great captives. I think I paid like $20 for mine,cant remember..