Cost value is a serious consideration, many good alternative refurbed candidates have appeared on Bargain Town here on AK for a fraction of the price of a professionally refurbed Mac.I think they try to keep it stock but I’m not sure- either way it will be restored to as good or better then new I assume. I just hope it’s very nice cosmetically- I told him I’m a little picky - so hopefully when I get the call it’s for one that’s in great shape.
I figure worst case- if I need more power or want to try autoformers there’s lots of power amps out there that match the look of 6200!
If it must be Mac, warranted, and a keeper, I'd recommend something that has passed over Terry DeWick's bench.
http://www.mcintoshaudio.com/