My model 167 TD series K was a gift in the late 1970's (new) and it has a serial number on the receiver. I'm told that the presence of the serial number indicates that it was likely mfg after 1968.
A bolt action Sears Roebuck shotgun would probably sell for $75 to $125 retail.
Retail tops out at $120.
Check with a gunsmith. They may have access to parts for obsolete rifles thru their trade sources (which do not make retail sales).
this is not exactly an antique or anything, mossberg made tons of these inexpensive shotguns-retail value:$75-$90
If your model 330 is a bolt action SHOTGUN, it is a Mossberg 183. These are good, durable, reliable shotguns, but not very high value. Depending on condition, these seem to retail for $65-$95 or so.
.410's are popular, but bolt actions and mail-order catalog guns are not. Most used bolt action shotguns will retail below $100, but a .410 could go as high as $200 (but I don't know why).
$266 us
You can purchase a Browning shotgun from retail stores such as Cabela's. Alternatively, you can purchase this item from online shops such as the Bud's Gun Shop website.
40-150 USD
as of 2007 a mossberg 185d in excellent condition will retail for approximately $90. This specific model is a bolt action 20 gauge shotgun with a 2 round removable magazine and screw on choke tubes. They were manufactured from 1947 until 1950.
Utility single shots seem to retail for about $75-$80.
They bring less than $100 at retail. sales@countrygunsmith.net