Your best answer should come from Daisy. Daisy offers a free service to answer questions about old Daisy airguns see the link below.
it would be worth somewhere in the range of $60 to $80
I assume you are asking about the 99 "Champion" not the 99 "Target special". In good condition it would be worth between $45 - $60
What physical and mechanical condition is it in? That determines the value.
I would contact Daisy directly at the link below and ask them.
There are several varations of the model 99. Your best answer should come from Daisy. Daisy offers a free service to answer questions about old Daisy airguns see the link below
what is a Savage 300 model 99 worth?
There were 3 different model 99's the 99 Target special -1959-1979 99 Champion 1967 and 99 lucky Mcdaniels 1960. I suggest you contact Daisy for more information. See the link below.
There are 4 variations of the Daisy model 99 BB rifle, not gun. Your best bet is to contact Daisy directly. They offer a free service to evaluate Daisy antiques. See the link below.
Not meant to be disassembled
It all depends on which Daisy model 99 you are asking about. 99 Target special: Variant 1=1959, Variant 2=1960-1979 99 Champion: mfg 1967 99 Lucky McDonalds: mfg 1960
A 99 Champion without any dings, scratches, wear, dents, like new is worth between $85 & $100 it was made in 1967
There were 3 different model 99's the 99 Target special -1959-1979 99 Champion 1967 and 99 lucky Mcdaniels 1960