Dont know what kind of deal you found, but I'm happy with my mine.
I got it about a year ago on sale for $550 + $60 shipping.
It'll clean cut 3/8 easy, and I tried 3/4, but that was beyond the its duty cycle.
I can hack 3/4, but is ugly and I get an overtemp light after a while.
Probably have 50 hours on it, no complaints except for the cord is way too short.
My Miller 375 burned up and replaced it with this one.
All in all, its has less than half the price and it works 'bout the same.
old coot