Where to sell complete book series?

Cleaning out my bookshelves and have a couple complete book series in excellent condition that I would love to sell. I used bookscouter to look up prices and most of them are not being bought. What other platforms should I look into? Based in the US.

If anyone’s interested, these are the series: -The Golden Compass trilogy by Philip Pullman (soft cover) -A Wrinkle in Time set (companion reads) by Madeleine L’engle (soft cover) -Uglies series by Scott Westerfeld (three softcover, one hard) -Hunger Games trilogy box set by Suzanne Collins (hard cover) -To All the Boys I’ve Loved Before trilogy box set by Jenny Han (soft cover) -Meet Felicity by American Girls (1-6) (soft cover) -Chicken Soup for the Teenage Soul trilogy by Jack Canfield (soft cover)

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source https://www.reddit.com/r/beermoney/comments/u4o2lj/where_to_sell_complete_book_series/