Daisy Model 21 - How to Value

I was given an old Daisy Model 21 Serial G1468 in decent condition. Plastic stock and lines down the rib. When I did a search on it I saw that it is considered an antique now. My question is how do I value it and where do I list it to sell for my relative? Will attach pictures if I can.
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The airgun blue book, 12th edition shows it was produced from ‘68-‘72. It lists the value as of printing, (2016) as $800 in 95% condition, (near new, little use, minor handling marks). The Sears marked one, made in ‘68 only about twice that value. There is a starting point. The Daisy museum has a form to fill out for history on the gun and value from blue book as well. A google search for a Daisy forum may be a good start as well.
 
Do NOT go by the Blue Book on these, check eBay for recent sales these have been off the charts. Glad I got mine years ago.

I agree. No matter what the bluebook says for anything, when it comes to vintage you have to go by what they are actually selling for. I’ve seen them go on eBay from $500 up to $800 in pristine condition. But I’m sure a good deal comes along now and then. It’s all about timing
 
That was actually two years ago when I seen those prices. And again it’s all about timing.You can be on there one time and there will be a lot of people interested in an item and the next time there’s not many people interested in the same item.I have been buying on eBay for many years and seen how prices can vary from seller to seller a lot.I don’t go on there just to look at air guns .I collect all kinds of things.
 
not a once in a while thing the prices I mentioned above, this has been the pricing for at least 8-10 MONTHS

I don’t doubt what you’re saying at all. Because I have seen prices are all over the place. And I haven’t looked at that particular gun in two years on eBay. The problem is some people will overpay because they have deep pockets and just want it that bad. And unfortunately for buyers it helps drive the prices up over the years. There are just some people that have more money than brains. Sorry but sometimes I am blunt about things.