it would be worth somewhere around $45.
Source Bluebook of air guns 9th edition.
Look on the right side just below the words Crosman Classic.
The 2100 started into production in 1983 but is now discontinued. I order to give you an estimate of value I need to know what shape it's in. Is it in Poor, Fair, good, Very good or Excellent condition?
CROSMAN 2100 You can find CROSMAN Parts and manuals at ( see the link below) This should give you a diagram on how to dissamble a crosman 2100.
See the link below. This is for the 2100 not the 2100B or 2100W.
Crosman still has parts available for this model. See the links below for the parts manual and Crosman customer service.
See the link below for the parts manual.
See the link below you will find all the Crosman rifles manuals there.
See the attacked link from Crosman for the parts diagram. See the Link Below.
Crosman has the information online. See the link below
See the link below for the owners manual.
See the link below for the Owners Manual.
2100 in fair condition. 4750 in excellent condition. That is for the carbine. The longer rifle....add 2000 to 5000 for excellent.