I think it would be a good idea to impose at maximum time limit for 'new sellers'' auctions, in the hopw that it would cut down the 'list and forget' people who are now being discussed in many forum threads.
I would think that where a seller has had less than (say) 10 sales, they could list for a maximum of 30 days, with the option of extending manually, until the number of sales is achieved, when the usual options would be available.
(Poll set up, and open to discussion!)