Your Rattrap gun is available for a test print here:http://shpws.me/njaO
There is always a chance that something in the design will cause a problem in the printer (most likely a wall is too thin or I left a plane on the interior that I should have deleted), in which case Shapeways will contact me to let me know something has to be changed.
Also, you might notice there is a little hole in the back and sides of the gun. Those are so that excess plastic powder can escape after it is printed. (Alternatively, I could have made the gun in two halves that snap together, but I figured a couple of tiny holes were less noticeable than a giant seam or parts not quite fitting together.)
I haven't put any mark up on the item, so that is the cost that Shapeways charges.