try the gunbroker.com or gunsamerica.com. Eventually one will pop up.
No, it's still available. They slightly changed it, though.
Browning Pump Shotgun "BPS"
No
Go to Browning's site, click on Support then date your firearm.
1977
If you don't have a manual, request one from Browning. If you can't wait, find a good gunmsith
Never heard of a model 22 BPS. A Browning BPS in 20 gauge can vary from 150-400 depending on condition.
No
cost
Among other BPS shotguns, yes.
32 year old BPS in 12 gauge.
No it does not. The Browning BPS Hunter is a shotgun. The "410" signifies the shell size (guage) in this case .410