Ebay please fix: this is dreadful advice.

Come fall, Ebay will charge sellers a final value fee for auctions ended early, where there is at least one bid.

They graciously allow one such event per year, with the fee waived.

That doesn't bother me too much. I think I've canceled maybe three such auctions over the past year, all for errors in the listing (such as "incorrect paypal account specified").

What does bother me is this advice from ebay:

Revise your listing to add more detail instead of ending it early. If you want to add pictures or additional details to your Auction-style listings, you can often do this without canceling your listing.

That advice is absolutely wrong (although observe the out-of-context "add more detail").

Either the error cannot be fixed once there is a bid (such as the Paypal address), or the fix would create a Natural Born SNAD.  A NBS occurs when the listing says contradictory things, such was when some addendum contradicts the original listing (which is what happens when a listing with a bid is modified).  A buyer may well not see the addendum, and the current bidder surely never saw it. Assuming the error is significant enough to need changing, it's significant enough to result in a Significantly Not As Described dispute, which would be won by buyer. 

Ebay, please do not recommend a Natural Born SNAD.