Yeah second hand is fine, I want a FF for widefield but can't afford an 11000, so figured a baader modded and cooled 6D would be the next best thing. So the warranty is no concern.
I'm torn on modding tho, 'coz a 6D would be nice for storm chasing too, I can't afford two!
I reckon the used price will plummet(currently around $1k) when people want to upgrade to the mkII, hurry up Canon!