I can't vouch for the story and w/o clicking on the link, I suspect it is 1 of 2 sellers, both of which have essentiually tried to force a market price on their cards by keeping the ask prices high enough to capture a few player collectors. Most are grossly overpriced in my opinion.
I have several garvey singles that were obtained for well under $10 each (one cost me a buck) and was pleasantly surprised to learn not that long ago that I have the entire set as well. I have had it for a while, so I suspect it was an early ebay purchase that just got put away for years.