My collection is missing some pretty essential records I know I would love but haven't gotten around to getting yet.

I have over 15 Tom Waits albums, but I don't have "Rain Dogs" and have never heard it.

I have every Dylan album up to Street Legal, except "Another Side of Bob Dylan"

I have 6 or 7 Ramones albums, no "Rocket to Russia"

Reason for this : I buy practically all my records in a 2nd hand shop so my purchases always depend on what's there or not, and I always get old stuff on vinyl, meaning some are hard to find for cheap.

So, essential Records missing in your collection and why ?