Henry, we need more information, a Ruger Single-Six is a 22 rimfire. The 44 Mag might be a Super Blackhawk, old or new model, or a Vaquero. (Might also be a Bisley). Could even be a Flattop, which would be worth much more than the $450. OLd Model SBH in fine shape might be worth $450. New Model, used is a toss-up. Including the belt and holster depends on the belt and holster. Could be worth from $50 to $500 for the belt and holster, but I doubt anyone would offer it included if it was an expensive rig. Try to find out more about the revolver. Rugers suggested retail for a new SBH or Vaquero is about $500 depending on finish (blue or Stainless), Vaqueros a little higher than SBH.