I'm another one of you in the 1000s of records categories. I buy anything that looks cool.
I also DJ, scratch, and make beats so I've got 4 Technics 1200s (2 M3Ds and 2 M5Gs) and the coveted Vestax Controller 1 turntable that has pitch settings in key so you can play notes with your samples.
I've spent so many hours digging and listening and scratching with records that it's really heavily ingrained in my family. I've found records in some of the most obscure places because I'm always on the hunt.
I'm just now putting the finishing touches on an 80s mix I've been working on for years. It's all 12" single versions of songs (with extended parts that even sound better because of the way they are pressed). So, continuously mixed the 12" versions of the base songs together and then added 100s of samples from all different types of soundtracks, video game records, etc. (anything 80s). I'll try to post it here when I finish.