Kinda got a hankering for one. Just because.

How available are they? Looking for shooter grade, but not junk. I want to enjoy shooting, coonfingering it.

Are spare parts out there?

Fuggetaboutit?

Not rare, but not easily found.  They suffer from old, English, declining numbers, odd calibre, tricky mechanism, so it has to be worth a lot.

https://www.gunbroker.com/All/BI.aspx?Keywords=enfield+revolver. Examples.

Their light weight makes them, built with a very small grip, nasty to shoot.  30 rounds and you quit.  Reverse of design intentions.

A .455/.45AR Mk.VI is WAY more pleasant to shoot from because of weight and grip shape.

At a state size association show, you might see one or two the weekend.  Of who knows the quality.

Repair parts generaly not obtainable.

https://www.gunpartscorp.com/gun-manufacturer/enfield/revolvers-enf/no2-mki

No hands left.

Worse are parts for the Mk. VI.  I even tried to find a spare hand in England.  Zero.

There's 19 on gunbroker.

Had one eons ago.  Like almost all of them, mine was double action only.  Trigger pull was gruesome.  They're an interesting collector item if you're into English stuff.