Buying and Selling: Gillett purchases Seven Springs, Pa., Mount Abram, Maine, sold and rumors of others; Canadian Resorts Revel in Dollar Gap; Choppy Seas on Equipment Side; Drop in Alpine Equipment Orders; Stephen Feinberg Purchases ASC Stock; Option Opulence at Vail about resort managers selling off stock; Snowblast and Sno-Core to Roll; Detachables Get Installed at Smaller Areas; Killington-Pico Interconnect To Begin.