How to increase traffic through my eBay store

Hi I have been selling designer clothing on Ebay for the last 12 months, and I am wandering how on earth I increase my traffic flow?  My titles are descriptitive enough to be brought up in search engines, they include the sizes in the title.  I have paid for advertisment through facebook and instead of getting traffic flow of 2-10 it will increase to 20-60.  For some reason the moment I stop the ad (as they are expensive, especially if you are not getting the turn over) I can not maintain that same traffic through my store.  I have set up a facebook page for my store, I also pin my items to Pininterest.  

I am not sure what else I can do.  There is money out there to be made, Im just not sure what I am doing wrong.  Any help or advice would be greatly appreciated.  

 

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