Discogs is a cloud-based, open-source and community driven database over records.
When it comes to vinyl, it has excellent overviews of issues, in various nations and by different labels. You can access a wealth of information about a given release, down to detailed photos of the labels, covers, dead-wax annotations.
Crate Digger is an app that accesses the Discogs database, via smartphones, etc. When you establish an account on Discogs, you begin marking which records you have that are already in the database - which is where those detailed label-photos, etc., come in handy. Then you can begin entering those records that aren't in the database, though it has grown tremendously in just a few years, and extended no-hits have become rare. But that's how the database grows, by members adding to it, thus sparing other members of having to do the entire work themselves.
Here's the entry for Beatles for Sale, from first issue onwards. Clicking each issue accesses different information for label/cover shots, etc.
http://www.discogs.com/Beatles-Beatles-For-Sale/master/45799
You can establish a Want List of specific issues that aren't in your collection, or where you are hunting for a better copy.
When crate digging for real, you can easily access the Crate Digger app on your smartphone, and quickly consult with your database: Do you have this record? Or you can find out the specifics of it by entering the release data, or scanning the bar code.