Because of the Battlestar Galactica auctions, we now have an account manager at eBay who I get to discuss eBay policies and listing practices and such with.  Well, I know from our own experience listing very valuable items, that you MUST take Paypal for any item you offer with no restrictions.
I found out this week in an email from Dom at IAW that they require a wire transfer for any amount over $ 2,000.  Well, that violates eBay policy and you can't require that.  So when I was paying for $ 12,000 worth of items I bought from IAW this AM, I used PayPal.  I am sure IAW is going to hear from their eBay account manager about this, so we may see the stated policy change soon.
I am sure IAW is trying to avoid the 2.9% fee you pay when using PayPal.  However, that is the cost of doing business.  When we were calculating our % with Universal for Battlestar Galactica, I figured in both eBay and PayPal fees as costs that we would have to absorb.
Alec