I've been active on Ebay for nearly ten years, and I've seen it degenerate from a pretty cool thing to becoming a magnet for thieves and hustlers of every imaginable kind.
To me, that's going to be Ebay's eventual undoing. It's a shame, too, because up until about 2001 it really was a great way to do business with people. It was my first resort for finding all kinds of great stuff.
But now, prices on a great many items are at retail or above; sellers gouge on shipping to avoid paying listing fees; too many people just plain steal money from buyers. In my first 8 years on Ebay, I never had a problem, but in the last two, I've had money stolen from two vendors.
As for the big Skype writedown, it serves Ebay right. Dabbling in that business was a foolish waste of money and just demonstrates how badly their management has strayed from the core business.