I offer a $1 shipping discount for each listings won. So 2 listings won with $3 shipping each would have a total of $4 shipping, and 3 listings won would be $6 shipping charged (assuming the listings you're buying are listed at $3 shipping each). I don't just charge shipping to meet costs; I also use it as a source of profit.

Here are the eBay listings (they expire in just about 2 days): https://www.ebay.com/sch/dzsolutions/m.html?_nkw=&_armrs=1&_ipg=&_from=