There's a company called Seamzeazy that sells adhesive sleeve repair patches, but they're fundamentally just creased cardstock with double-sided tape.[1]
Discogs is a decent and easy-enough resource for checking if any of them are notable. There are often etchings in the runout (the inner groove near the label) that you can search for on Discogs to identify specific pressings. You can also sell through Discogs, but it sounds like you're leaning toward keeping them and LA is full of local shops that would buy or take them.
A record clamp can mitigate warping without costing a ton, though it won't work miracles.[2]
There's also always using the long-gone ones as wall art.[3]
Discogs is a decent and easy-enough resource for checking if any of them are notable. There are often etchings in the runout (the inner groove near the label) that you can search for on Discogs to identify specific pressings. You can also sell through Discogs, but it sounds like you're leaning toward keeping them and LA is full of local shops that would buy or take them.
A record clamp can mitigate warping without costing a ton, though it won't work miracles.[2]
There's also always using the long-gone ones as wall art.[3]
1: https://www.yoursoundmatters.com/how-to-fix-split-seams-on-r...
2: https://www.turntablelab.com/products/turntable-lab-record-c... - Turntable Lab is just a solid shop in general for new vinyl and accessories.
3: https://mingoaudio.com/product-detail.html?id=733813497923