Your post promtped me to check/think things out:
The buy-it-now listing fee is only a flat 5 cents -- even for $1,000,000 buy-it-now. And the maximum listing fee is $3.30 for an auction listing -- even with a $1,000,000 opening bid. Altogether, not so much to advertise something in a big way. I doubt if the fees are returned if you cancel an auction.
Robt.