I learned a lot from this - my Dad has been considering setting up with ebay and I wasn't aware of this witholding thing, so I'll tell him.
I've been using Ebay a long time, but what I found is that, if you don't sell for a while, they start restricting how many listings you can make. When you have a 100% record going back to 1998, and you have literally one week in which you can list items and post them out, that's more than a little bit frustrating. I have no idea what's inspired all of this, except a sudden influx of ebay usage, but with the funds, is it like the old escrow system?
It doesn't make sense to me, being that it's so easy to charge back with paypal (unless it's not so easy now Paypal and Ebay are separate entities)