The people selling like this on
eBay fall into one of two categories.
1. "Oooh...a casino chip......kinda weird thing. Might even be rare that one got loose from the casino...probably worth something.....I'll price it at 20$"
2. What I call the "one idiot theory;" All the buyer needs is '1 idiot' to bid on his item. He cares not that the item is available elsewhere for 90% less; he is interested in the 'impulse buyer' who sees something and needs to have it while doing no research on price or rarity.
If you would like to, I'll be happy to play devil's advocate and be the 'monster' that answers your questions.....
Shoot!