Yes, as a 210M owner, it's absolutely driving me insane that no one has picked up this beauty.
These things are so fundamental when printing with fiber paper that you'll never post or even read a "how can I flatten my FB prints?" thread again. It's very simple: 60 seconds at 200F in the Seal (which only takes 15-20 minutes to heat up) between 2 pieces of matte board and move the heck on. Not only that but (bonus!) you can also use it for it's actual intended purpose of dry mounting prints!
300$ for a 210M in this condition is a STEAL PEOPLE, SOMEONE BUY IT.
Stop worrying about grain, resolution, sharpness, and everything else that doesn't have a damn thing to do with substance.