I bought mine in April of 1970
50-150 or so
100-300
model 151 k with scope
About $150-depending on condition.
03.20.2008 I bought a NICE one today for $60.00 USD.
10-150 USD or so
50-125 USD
50-200
If your Mossberg is a bolt action shotgun, about $80-100. These are well built utility grade guns- no major collector interest, but durable and reliable.
Mossberg made all their rifles in the USA.
50-500 depending on specifics.