If I recall, they're priced identically. If not, very close to each other.
Being a custom gun, it's simply a matter of calling and if they have one, they have one. if not, they make it and you get it when they're done. You may be able to find certain stores which get them on a regular basis, and based on the cost, probably don't move them too quick.
I know Unique Sporting in Anaheim (makers of unique pro gear) usually have some on the wall when I go in there. some other high profile shops may have them infrequently as well. If you don't mind used, you can find them on ebay once in a while.
i've only shot one once before, at the range. the pump stroke was like butter, and it shot darts.
I know there are others (Yar) who've had more extensive game-time experience.
Make it any color you want as long as that color is black.
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