I also have a 640T and did a search, there was an auction where one with a 4x scope went for $190.00.
Made in 1976. Link at bottom of page to Mossberg .22 rifle info.
value of mossberg 800c 22-250
185 d Model 20 ga Mossberg Whats the Value
would like the retial value of a new Mossberg model 860
The value of a 1958 Mossberg model 185K-A is determined by the condition of the shotgun. If in good condition this gun has a value of up to 300 dollars.
$100.00
150 USD
50-125
I acquired a Mossberg 500 AG shotgun. It has never been fired and might be 10 years old. What is the value?
I recently bought a mossberg 472 30-30 for 285.00
$75-100