$250-$300
Can order from online for $308 w/free shipping
$ 310.00 from the Sportsman's Den. Shelby,OH.
You have the rare version of the model 26,as it has the mannlicher-style stock.The Mossberg model B26M(M is for Mannlicher style stock) was made in the year 1938 only.
It will be full length.
100-500 USD
value of ANY gun is based on exact make, model, and condition. You did not give us enough info to answer.
Never heard of a model 50, model 51 yes, but, no model 50. There is a model 50. It is a like the 51 but without the mannlicher stock. http://home.epix.net/~damguy/exploded.htm It was also made for Wards Western Field as the model 04m-489a The 51 has an S100 receiver peep sight as does the 51m (full Mannlicher style stock). The rear sight on the model 50 has the barrel mounted one adjustable for windage and elevation. Check out: http://home.epix.net/~damguy/models.htm
50-225 USD or so
They haven't. It is in their current catalog
$1000-1500 depending on the condition of the stock blueing and action.
You will have to check stock maker web sites. Not offered as a regular production item.
400-800 depending on condition and options [stainless, manlicher stock, etc.]
Fitting will be required.