I guess I should be a little clearer. My understanding is that if you write support they can combine their part (fees) into one fee structure rather than 2. Now, this could possibly depend on the plan you have (some plans may not offer this). But combining your ebay accounts NO, I am sure they can't.
I would sure write support and ask, as I am sure I have read that 2 can be combined for auctiva (not ebay) fees.
Vickie
http://stores.ebay.com/VICKIES-VARIETY?_rdc=1