View 85 Photos View 0 Videos 2015 Keystone KEYSTONE Toy Hauler At auction May. 24 2015 Keystone Carbon 31 Toy Hauler Camper Trailer. Original Owner. Vin#4YDT31121FR805016. 2 Slide Outs, Rear Motorized Bunk Beds, Dual Propane Tanks, Cummins Onan RV4000 Generator. Original... Lot Number1ConditionUsedRear AxleTandem Axle MLS Number14387643CategoryToy Haulers Last Updated5/23/2026 LocationPleasant Valley, NY, US Listed ByAbsolute Auctions & Realty, Inc. (800) 243-___ SHOWNUMBERCall Seller Email Seller Save More Info