I've thought of it, yes. An original MIJ is usually $200+ these days. I'd say about $225-250 depending on condition. I'm tempted to get the Waza, but at the same time, have almost given up on HM-2 on bass (at least the "sonic destruction" form of HM-2, I still love my Throat Locust on low gain on bass). I also prefer the Arion Metal Master HM-2 clone on bass - it seems meatier to me than the original (though the housing is plastic and therefore suspect). Also, if it's a pure clone (which I'm sure it is!), I have an old HM-2 I don't use that I can always throw on the board. I will likely pick one up in the used market later, if I'm being honest.
Currently, my favorite HM-2s for guitar chainsaw are actually clones, and I don't use the original for anything. I got them both for less than $100, and have no complaints. They're the Peper's Pedals HM-Too Many Clones (or HM-TMC) four knob version (there's also a 6 knob version with mids and blend) and the BYOC Swede. Both are used for chainsaw, but I typically leave distortion about 10:00 and highs just short of max. Plenty of chainsaw for my needs.
Off the top of my head, I have the following HM-2s and clones:
MIT HM-2
Behringer HM300
Earthbound Throat Locust
DOD Super American Metal
BYOC Swede
Peper's Pedals HM-TMC (4 knob)
Arion Metal Master
I used to have the Lone Wolf Audio Left Hand Path, but I couldn't gel with it and passed it on.
I also just realized how many parentheses I just used... Sorry about that.