I almost bought one in 2003. I even went through the "process" to buy it here in California but decided to use the deposit to buy a Glock 17. I forfeited about $50 in restock / re-register fees.
I am glad I got the G17 but I have ALWAYS regretted not getting the M-6. I had it for $239....
It would have been a .22lr/.410 because of the price, value and surplus of .22lr.