Good luck! I have never seen one in person, only photos that may or may not be photoshopped. Most people believe them to only be a myth, and I'm ready to join that club.
I had a guy offer me a male once - $500.
They are beautiful geckos, but no site i've been on has had them
i saw two of them once (at the vary least thay where vary white and it wasn't because of shed) but thay are rare and when i say rare i mean freaking rare. but if you can find a gecko that stays white all the time (not just on a blue moon every leap year) thay would probably go for $500 plus.
a lot of cash!
well the once i saw where amazing looking but i don't know if it was a true moonglow as i was at a show but thay where vary convincing. you really have to be careful so you don't get scammed, though i know of one guy that got scammed farlly recently when he when to buy one. you can find the thread about it on fauna's BIO
those are pretty expensive geckos, but its probably worth it!
not try to dissuade you but just making sure you know to be careful when buying them
These websites occasionally have them for sale
Crested Gecko
CrestedGeckoMap2
Here are some pics of some
Moon glow Cresties - Reptile Forums
Moonglows are rare and always wanted so there hard to find, most that you see arent real moonglows, so be careful you dont spend alot on somethin you didnt want if i come across any for sale ill let you know but there expensive
Buy 2 and breed them. Then sell me one for 10 dollars lol