The local Wal-Mart has a couple of those but they seem a little expensive especially since they are Taurus or Rossi.
GunBroker has 'em between $500-$600, but then you gotta pay postage and a transfer fee. Sometime you hit on a good deal: got my stainless beauty for $475 + $60.
If you think those are expensive single-shots, these may well give ya a heart attack:
http://www.eabco.com/store/single-shot-rifles/standard-model-97d-rifle/
Best grab a couple whilst they’re still cheap!
Also available as a pistol if desired.
They also carry LOTS of other nice shootin’ goodies and I’ll add the that couple times I’ve purchased from them in the past I was completely satisfied (just ammo, scopes, etc., no firearms as of yet).