You need to find a way to lower your listing fees. If your dropshipping items and need the security of higher starting bids and reserve amounts then you will have a much lower selling rate. If your paying $2.00 for listing fees then your retun rate is too low. Try finding a way to buy the product in bulk to save money and find ways to lower your listing fees.
If you have a lower feedback score. Eg under 500 then you will struggle for a bit. The best advertising for a store is ebay keywords and also using google adwords to advertize your store address.
Other things would be to buy bulk items like clothes and small dollar items that have very low listing fees and can generate even more flow into your store so ebayers can see your products.
You can goto liquidation.com for items such as this and buy bulk items for decent prices. Usually you can get lots of clothes in 500 piece increments for under $600 and you can use your profits for this.
As far as listings I average a 40% selling rate. But I can sell 400 items easily a month and still turn great profits. Normally 4-10 dollars an item. But I list close to 1000 items a month and my listing fees are only around 400. The only reason My average sales percent is low is because I list all my actions only for 1 day. And I scheduall them to sell at key times.
My item costs average $1,200
My sales average is $3,200
And my fees average $400 per month.
I keep my fees low. Its just something you have to do in order to maximize profits.