How about restricting the number of consecutive items listed at the same instant to 5 in a 24 hour period ? With only 10% of members listing 90% of the items for sale it leaves the 'little' guy out in the breeze. How about building a site,( RJ2 ), specifically for mass listers and leave ( RJ1 ) for the 'little' guys. I completely understand the business reason for accepting ALL listers but.....
There IS an alternative place specifically for the 'little' guy with just a couple of items to sell.