It's really not worth much I would say $25 to $50
I agree with the above statements that you might find a sucker on Craigslist who will pay more.
Also if you were going to upgrade I'd recommend the V8 over the V10.
But I would definitely take a look at all of the market I think Hoover has just as good of offerings now in cordless segment.
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[URL unfurl="true"]https://www.hoover.com/vacuums/cordless-vacuums/[/URL]