At One Point, People Were Willing to Pay Hundreds of Dollars

At one point, people were willing to pay hundreds of dollars on eBay for a Beanie Baby toy that originally cost a small fraction of that. Today, those same Beanie Babies can be found at garage sales for less than a dollar apiece. This is most likely due to

A) faulty craftsmanship in later production batches.
B) a sharp downturn in the economy.
C) the new, more nostalgic fad of bobblehead dolls.
D) too many counterfeit Beanie Babies entering the country.
E) a product becoming a fad and then losing its fad appeal.