Great list here from SnoCountry.com:
NORTHEAST:
Sept. 19-21:
Potter Brothers Ski Shop, 1083 Route 9, Lawrence Farms Plaza, Fishkill, N.Y. Fri., 2-8 p.m.; Sat., 9 a.m.-6 p.m.; Sun., 10 a.m.-5 p.m. (845) 297-2941
Sept. 26-28:
Potter Brothers Ski Shop, 57 City View Terrace, Kingston, N.Y. Fri., 10 a.m.-8 p.m.; Sat., 9 a.m.-6 p.m.; Sun., 10 a.m.-5 p.m. (845) 338-5119
Oct. 3-5:
Pico Ski Club Sale & Swap, Pico Base Lodge, Mountain, Pico, Vt.; Fri., 5-9 p.m.; Sat., 9 a.m.-4 p.m.; Sun., 9 a.m.-1 p.m. Proceeds benefit Pico Ski Club racing programs.
Oct. 4-5, Oct. 11-13:
Ski Haus,1890 A South Road, Poughkeepsie, N.Y. Sat. & Sun., 11 a.m.-5 p.m.; Columbus Day Mon., Oct. 13, 11 a.m.-7 p.m. (845) 298-9597
Oct. 9-13:
Wachusett Mountain Ski & Snowboard Sale & Swap, 499 Mountain Road, Princeton, Mass., Thurs. & Fri., Noon-8 p.m., Sat., Sun., & Mon., 10 a.m.-5 p.m. (978) 464-2300
Oct. 11:
Plattepalooza Festival, Plattekill Mountain, 469 Plattekill Mountain Road, Roxbury, N.Y., 11 a.m. Ski and bike swap, new and used equipment, benefits mountain’s volunteer ski patrol. (607) 328-3500
Oct. 11-13:
Ski Butternut, 380 State Rd., Rt. 23, Great Barrington, Mass., Sat., Sun., & Mon., 10 a.m.-5 p.m. (413) 528-2000-x160. Proceeds benefit Butternut’s adaptive ski program.
Oct. 18-19:
Bousquet Mountain, Bousquet Lodge, 101 Dan Fox Drive, Pittsfield, Mass. Sat., 9 a.m.-4 p.m., Sun., 10 a.m.-4 p.m. Discounts of up to 75 percent on gear and clothing. Used gear four years or newer also will be available; 20 percent of the sale benefits the Bousquet Ski Club. (413) 442-8316
MIDWEST:
Sept. 26-28:
Buck Hill Ski & Snowboard Sale & Swap, Buck Hill Resort, 15400 Buck Hill Road, Burnsville, Minn. Fri., 2-9 p.m., Sat., 9 a.m.-7 p.m., Sun., 10 a.m.-noon. Proceeds benefit the Buck Hill Ski Racing Club.
Oct. 4:
Skitoberfest, Boyne Mountain Resort, Civic Center, 1 Boyne Mountain Resort, Boyne Falls, MI, benefit Boyne City High ski teams, 10 a.m.-3 p.m. (231) 758-7600 Bob Simpson
Oct. 4 -5:
Wild Mountain Open House & Swap, Wild Mountain, Taylors Falls, Minn., Sat. & Sun., 10 a.m.-4 p.m. (651) 465-6365
Oct. 5:
Sunburst Ski Area, 8355 Prospect Drive, Kewaskum, Wis., Main Lodge area, 11 a.m.-2 p.m. (262) 626-8404
Oct. 17-19:
Boston Mills/Brandywine Ski Resort Patrol Ski Swap, Boston Mills, Ski Patrol Swap Tent, Peninsula, Ohio; Fri., 10 a.m.-8 p.m., Sat. and Sun. 10 a.m.-6 p.m. 20 percent proceeds benefit Boston Mills/Brandywine Ski Patrol.
Oct. 24-25:
Welch Village Fall Ski Swap & Sale, Welch Village Ski and Snowboard Area, 26685 County Road 7 Blvd, Welch, Minn. Fri., 4-9 p.m.; Sat., 10 a.m.-4 p.m. New and used equipment and gear. (651) 258-4567
Oct. 24-26:
Windy City Ski & Snowboard Show, Renaissance Schaumburg Hotel & Convention Center, 1551 N. Thoreau Dr., Schaumburg, Ill. Fri., 3-10 p.m., Sat., 10 a.m.-9 p.m., Sun., 11 a.m.-5 p.m. Show admission: adults $12; kids under 12 are free. Sale is run by the Southern Region Ski Patrol, INC. as an independent fund raising event. (847) 972-6521
Oct. 25:
Ski Swap at Crystal Mountain, 12500 Crystal Mountain Drive, lower level of Crystal Center, Thompsonville, Mich.; 9 a.m.-2 p.m. Proceeds benefit local high school ski teams. (231) 378-2998
Oct. 25-26:
Chestnut Mountain's Open House and Ski Swap, 8700 W. Chestnut Mountain R., Galena, Ill., Sat., Noon-5 p.m., Sun., 9 a.m.-2 p.m. New and used equipment. (800) 798-0098
ROCKIES:
Sept. 26-28:
Snowbird Sports Education Foundation Ski and Board Swap, Snowbird Ski Resort, Park City, Utah, Fri.-Sun. 10 a.m.-7 p.m., free admission, 25 percent of all sales benefit the Foundation. (801) 933-2222
Oct. 10:
Weber State’s Outdoor Program Gear Sale and Swap, Weber State University. Lower Bell Tower Plaza (north entrance of Student Union) Fri., 8 a.m. - 3 p.m. (801) 626-6373,
Daniel Turner
Oct. 10-11:
Winter Park Resort Ski & Snowboard Swap, Winter Park Resort, West Portal Station at base of resort. Fri., 5-9 p.m.; Sat., 9 a.m.-5 p.m. Entry fee Friday only: $5 per person or $10 family. (970) 726-1590 or (303) 316-1564