The model 6 being the inexpensive version of the 4 makes it less desirable as a collectors item but the key being condition and this case mostly the box. Realistically a excellent to mint model 6 is worth between $5-600 but the box will add $2-300 on that, you might very well be able to squeek and G out of it. I collect those myself if your selling... ;)
The 1894 was a side by side barrel the 1893 was the single shot
We'd need to know which model it is, if it has been altered from original, and in what condition. sales@countrygunsmith.net
100 USD or so
It depends on condition; a parts gun sells for $25 and an excellent condition rifle with 95% original finish will bring $150.
300 or so
Greatly dependent on the model and condition. Your description covers about 50 different rifles, and several handguns.
i just paid $250 for one in excellent condition seconhand
$75 if in excellent condition, $35-$50 in typical condition.
The value of a Winchester 121 22 single shotgun depends on its condition. As of 2014 these sell at auction for around 160.00 in excellent condition.
Have not seen the term thumbcock. If your gun is a single shot Remington 1893 shotgun with a thumb lever on the left side of the frame, those sell for $150-$300, depending on condition.
As a rule they seldom bring more than 100 USD in excellent condition.
Seldom more than 100 USD in excellent condition.