this depends on a few things:
if you want a gas airsoft revolver you can get a crossman or an HFC revolver. If you want a spring revolver the only one is the UHC revolver. the most realistic of the three is the UHC because it only fires six shots before you need to reload (the others fire 10 shots) the UHC is also the cheapest. But the more practical revolvers are the gas ones because you get more shots without having to reload (which is a use full feature when playing in an airsoft war).
So take your pick.
But if you want the best of the best revolvers in airsoft you should get a WG 700 series revolver or a Dan Wesson revolver. They are co2 revolvers that shoot extremely hard. They are somewhere in the 100-125$ range
No, they can not, do not attempt to mix real ammunition in airsoft guns.
yes
Yes, for the price.
I have never seen nor heard of a revolver airsoft pistol with non reusable shells. You should have no problems reusing them.
no
They are allowed.
You have to take it apart
No.
One can purchase airsoft revolvers at Hobbytron, Airsoft Station, and Air Gun Station online. Large retailers Walmart and Sears sell airsoft pistols and repeaters but do not carry revolvers.
None that I know of.
maybe
yes you can search utg revolver they come in many different lengths (the 8 inch is the coolist)