Obviously, this is not a technical issue, but I will provide some advice....
Well, the first route is optimizing your shop so it is in good standing and not downgraded in search. You are missing a shop title (which should have keywords in it), shop sections, and an About section.
After that, it's about understanding seo on etsy. In looking at your listings, I would suggest fleshing out your titles first. I looked at "Phil Collins - Face Value". Although you show a photo, you need to say whether it is an album, a tape, or a CD. Including the date in the title would help too.
Then, you are not using any tags on that listing (!). You have 13 opportunities to bring in a buyer and you filled out none. They need to be phrases (no single words).
Then, the description is too sparse. Give more details! Let's say I was searching for that album that had "In the Air Tonight" on it? I'd never find your listing unless I knew which album it was on. See where I'm going with this? Collectors also want to know more than "Record is in great shape". A collector will want to know the condition of the sleeve, whether there are any markings or tears or whatever.
Lastly, if you have a business social media account, you can rely on that to bring in your own buyers.
