I think one thing you could do is to try and highlight functional features of the wallets in the titles and main gallery image. I know that in the past, when I have searched on eBay for items like these (bags, wallets, purses etc), I searched more for specific features and sizes over look.

For example, if something contains 8 slots for cards, I think you will improve click-through rates if you can show that in the item images or titles, because people can see up-front that an item will have the features they're looking for, and IMHO on a site where there are thousands of other similar items listed, you have better chance or gaining interest if people know you have what they want rather than if people have to click through to find out if you have what they want. 

You could do collage or composite gallery images to show those sorts of things, I apologise for taking taking the liberty , but I wanted to show an example of what I mean with one of your own products (image done via a site called PicMonkey using the collage feature, which is free, background brightened a little, as well, plus removed yellow lighting tarnish from what I presume from the other components is a silver tone, lightened shadows somewhat - took me about 5 mins, and if I was being a bit more careful I would have made the pic a bit more balanced overall) :