Price tied to lenght of ad
 

The ability to price the ads with the length would be very useful.

At this time, it doesn't matter what the length of the ad is, they are all the same price.

I would like to charge an different price for a 1yr ad then for a 3 day ad. To me this would seem to be a pretty fundamental feature.

Nice idea

Multiple Quantity
 

Multiple Quantities would be useful, as well as SKU.