www.plymouthski.com on Main St near the MVSB does skate sharpening for eight dollars, while u wait, or for six dollars if you leave them, there.
Plymouth Ski & Sports has a big selection of new ice skates, too.
Their master ice skate sharpener has a Ph.D in ice skate sharpening having studied the craft for seven years at the Helsinki School of Hockey & Figure Skating with a minor in broom ball sharpening!