In eBay's early days, it was a place where buyers and sellers of collectible items congregated to conduct business. Eventually it grew into the "Sell Everything" site that we see today. The changes that eBay has made over the last couple of years in addition with future changes might very well send collectors to "niche" or "specialty" auction sites to buy and sell items with others who have a common interest. Niche sites can bring collectors of a similar interest together and these collectors can form the basis for a strong community. Etsy is a prime example of a niche site making a big splash. As niche sites in other areas begin to take hold, buyers and sellers with a common interest will rely less on eBay and more on each other and the community they build outside of eBay. Loss of many of these collectors and and the reduced number of collectibles for sale on eBay will dilute and erode the site. It was collectors who built eBay into the site that it was in it's prime 5-8 years ago. It might very well be those same collectors who make the biggest contribution to eBay's descent into mediocrity.
There are many different niche sites out there and here are a few of them
Mommy Auctions (www.mommyauctions.com). A place where young mothers can gather to exchange tips, socialize and of course, buy and sell new and gently used children's clothing, toys and othe ritems.
Chase The Chuck Wagon (www.chasethechuckwagon.com). Auction site for video game enthusiasts.
Money Auctionz (www.moneyauctionz.com). Auction site for collectors of coins and other currency.
eRock (www.erock.net). Auction site for music and memorabilia buyers and sellers.