It would help if you gave the manufactures name and the current condition of the pellet gun. without more details it is not possible to give an estimate of value.
This model was made in the 1970. It would be very hard to give you an original price. They were made in the Czech Republic. One in "Like New" condition today would be worth $65. In the 70's that would be around $30 is my best guess.
It would help if you stated the model and the condition of the pellet gun. Without some information it is not possible to answer you.
What condition is it in. That determines the value
About 50 USD
$100 to $125
Around $50
What Condition is it in? That determines the value.
What model is it. How old is it, what condition is it in, is it still working?
It would help if you stated the condition of the rifle.
25-75 USD
Which model, What condition is it in. You need to give more information.