Sssome seller claim the high shipping is to compensate them for standing inline at the post office.
Some sellers who charge a high shipping fee also toss your item loose in a USPS box!Some sellers don't get positive feedback because of this even when by some miracle the item isn't broken!
Yahoo auctions had way more scammers.
I wouldn't mind seeing an alternative but the eBay situation is similar to Microsoft and Windows.Both have a near-stranglehold on the market, and only niche markets use something different.