The value is totally dependent on condition, as are most things. I just picked up a real nice model 29 for $65, which was a steal, in the good to very good condition it is in it is worth $100-175.
You can find these rifles anywhere from $60 all the way up to about $200, again, totally dependent on condition.
There were dozens of different shotguns made for Sears under the JC Higgins name. Your question is the equal of "what is a Ford car worth?"
what is a. jc Higgins pump shot gun. model 20-12 gauge worth??
$150
$75
$75
depends on the model- which you did not tell us. There have been several 30-30 rifles sold under the JC Higgins name.
8,000 to 17,000 dollars
100 USD
100.00$
8,000 to 17,000 dollars
50-125 USD
JC Higgins RifleA JC Higgins model 85 in good to excellent condition with original box is worth about 100 dollars.