Your talking about an air rifle that has been out of production for years. I suggest places like Graigslist or one of the guntrader web sites.
Crosman offers a free service to locate shops that repair older Crosman products. See the link below.
I can not find a CROSMAN model 350 BB gun, Do you mean a V350 BB rifle. If so then one in good condition is worth between $55-$70
This air rifle was made by Crosman air gun company. In reality it is a Crosman model V350. Crosman has the parts manual online See the link below. Crosman also offers a service to locate shops that repair older Crosman air rifles.
This is a JC Higgins model air rifle made for Sears by Crosman air gun company. Its really a Crosman model V350 made between 1961-69. It's a push barrel BB rifle.
I believe you are asking about a Sears model 126.102940. If I am right, then it is a Crosman model V350 BB rifle caliber 175, Push barrel made between 1961-1969.
I know of No Crosman BB GUN model V35C. However Crosman made a V350 BB Rifle from 1962 to 69. If this is the rifle you are asking about please post the condition of the rifle. ( excellent, good, fair or poor.) It was a push barrel rifle. Is it in working condition? Repost with the information.
Both Crosman and Daisy made airguns for sears under the JC Higgins brand name. Any sears model air gun that started with 126 was made by Crosman. Any air gun model starting with the numbers 799 was made by Daisy. Here is an Example: Sears model 126.10294 was made by Crosman and is really a Crosman model V350
Ther V350 Was made from 1961 -1969 and in Fair condition it is worth between $35 -$55.
Contact Crosman. Email them. They should be able to help.
Crosman's web site has a section on Parts and manuals for all their Rifles and Guns. In there you will find an exploded view of your 150. You can also check eBay for repair manuals for Crosman. I have seen quite a few for sale. See the link below
This particular model was made by Crosman air gun company for Sears. In reality it is a Crosman model V350. In order to give you an estimate of value. You need to state the current condition of the rifle. Without some sort of rating from Poor To Excellent, It is not possible to answer you
I don't know if this will help by I would contact Crosman directly and ask them. (See the link below for Crosman contact page,)