If you are using the 3 free relists from your 40 free listings a month, those relists are free. If you go over your 40 free listings for the month, you are paying $1.50 for each item listed over the 40. Each time those ones relist, you are being hit up another $1.50 for the relist. As already mentioned, just use the 40 free ones a month, with the 3 free relists. EBay are often having promotions where they offer 100 or even 150 free listings for the weekend. Use those to list the other items you want to list over the regular 40. Not everyone gets a notification about those promotions, so keep and eye on this forum because someone always posts a link to the promotion page. Majority of the time, anyone can click on the page and get the freebies.
When I first started to sell stuff a few years ago, I was very naive. I was listing some items over the free ones and being charged the listing fee for those, which I knew. I wasn't selling anything, so was actually losing money because I was paying eBay, but not making any money from sales. My issue was, I was impatient. I still only use the 40 free ones now, but I will spread them out over the month. Mostly I list for 7 days, but sometimes I will list for 10 so they relist for the entire month if they don't sell.
Just as an aside, I was just looking at your listings (I'm a coin collector) and your listing for the 2001 50c Federation coins. It looks like you've made a small error you may want to fix. Under 'item condition', you've got "Uncirculated $1 - carded - new". I am assuming you've used the 'sell similar' option to list that item and forgot to change that bit (done it plenty of times myself! I normally forget to change the colour of something in that section). It's an easy mistake to make.
