The pricing of a browning model 21 knife can be worst a lot of very little. It all depends on the shape the knife is in.
The only Browning Model 725 I am aware of is a knife.
AFAIK, Browning never made a model 810.
10-100 usd
Browning never made a Model 51 shotgun.
They never did. 14 ga was never made in any model by Browning
Browning never made a model 306
That is not a valid Browning model designation.
The only model that Browning made that comes close to your question is the model B-80.These range in price from 230-300 dollars.As far as my research indicates,Browning never has produced a model 8 shotgun.
It depends on the model
Never heard of a model 22 BPS. A Browning BPS in 20 gauge can vary from 150-400 depending on condition.
The word Citori is the name of the model of Browning you have.
No such model in the Browning line.