Le Fanu
So true. Plus, coupled with us seeing lists in trading threads, people getting money for them and the temptation may be too great. If people need a bit of cash and they have had the psychological factor of seeing others sell, that's why they may go for it.However, there are about two thousand and one different "things" of which I'd sooner divest myself---documents that want shredding, books, clocks, old winter coats, boots, watches, an electronic keyboard I haven't turned on in 7 years, furniture, a scanner/printer I recently replaced, and half a dozen kitchen appliances I can't be bothered to use---before getting rid of even one of my lesser-liked tarot decks.
I too can think of a dozen other things to get rid of to help me create space before I reach my decks, even if they do take up space. Books I'm never going to read again take up more space than decks but they don't bring in much cash and who is going to swap old books with me? Chiriku makes a good point. I wonder how many of these people trading/selling decks have closets full of baby clothes and books and old art stuff and broken printers that they're never going to use and which take up more space than decks? They don't sell them because they wouldn't bring in as much as - say - a Buckland Romani Tarot.