This is only my opinion - but if you have a sell through of less than 35% - 40% it most likely is not worth it, and I am speaking as a 'store operator' - average I would think s/be 37% - freight factored

Just looking at the data in selling manager pro one of my higher selling listings that has been active for about 1 year (all my listings are multi quantity) I have had 1100 clicks and 100 sales which is about 10% sell through, most of my listings have similar rates.

Maybe it's just the products I am selling that gives such a low sell through which is only low cost items.

It is worth it but maybe I should jazz my listings up a little to increase the rate of sale. Although some listings sell well with basically no info at all and a one line description.

What do you mean by  "freight factored" ?