"I've listed a WCDI $5 chip on Ebay not knowing what it is"
"I tried very hard to find out it's true value before I listed it on ebay"

Those two statements dont exactly tally with each other.
If you look on ebay the average price for any $5 chip is probably $10. Setting a reserve way above the value of this chip even if it was genuine seems a bit arbitrary to say the least.