1 - Your photos don't look good small. Buy a white piece of poster board. Photograph your items against that. Crop the photos so that there is no wasted space on the longest side of your item (for example, the top and bottom of the VHS). You're wasting prime real estate to market your items to people in the search by making them appear smaller and difficult to see. People often browse on cell phones or small laptop screens. You don't have to re-take all your current photos, but I would consider taking 15 minutes to revise the listings and crop the main photo around the item so that it will appear bigger in the search results.
2 - You do not offer lettermail shipping. Nobody will pay $13 to have a card shipped, unless it is a very high end card where $13 represents a very small amount of the value of the card and security is important. For cards like a $10-$20 Young Guns, you need to offer cheap shipping. The only way to do that is to ship lettermail. You will not be covered by eBay's seller protection. That means you will eventually lose a card to either lost mail or a scam. Theoretically, the increase in sales and profits makes up for having to refund a package every once in a while.
3 - You don't have very many items. To produce sales, you need a lot of items. Trading cards and VHS tapes do not have high sell through rates. They are niche categories. I'll assume your items are priced at the market rate and not over or under priced. If you fix your shipping for your cards, and you sold 10 cards a month for every 100 listed, that's probably a pretty good sell through rate. eBay doesn't work in a way where everything you list sells right away. In order to sell a lot on eBay with niche or low sell through products, you need thousands of listings. At one point, I had something like 4000 piece of media listed, and that would generate 400-500 sales a month. A low sell through rate tends to be more draining when you only have a small amount of items listed, because it feels like nothing is selling, when the reality is that your sell through rate is similar to bigger sellers you just don't have as much listed.
4 - You need to promote your items. If an eBay item is not promoted and doesn't sell within the first 24-72 or so hours of you posting it, it probably won't sell, or it won't sell for a very long time. The eBay search defaults to a preference called 'Best Match'. That means when I type in an item like "Tim Stutzle Young Guns Rookie Card", eBay has an algorithm that will decide which sellers items to feature higher up on the 'Best Match'. Both newly listed items and promoted items get a leg up in being one of the first items shown. Promoted listings is an entire can of worms that I can't get into here because it is getting exceedingly complicated, but if you don't understand it at all, the best thing you can do is to simply choose a low flat rate and promote all your listings using that low flat rate. It might not be the most effective and optimal way to do it, but you will at least get some additional exposure via the 'Best Match' search and off-site traffic like people coming from Google searches. The only time you don't need promoted listings would be for a very niche or rare item with a lot of buyers and almost no competition. For 99 percent of items, you need promoted listings to make sales.
