^ ^ Great and very informative post. For jazz fans I highly recommend the ECM label German pressings, Pat Metheny etc.
In general, the quality of vintage records is higher, 50´s, 60´s and 70´s. "Dynamic compression" kinda nailed the opposite. The first pressings practically are much better than later editions, and the label´s country of origin usually are better. There are exceptions, like a certain Pink Floyd album from Germany, and even not the very first edition, has the best sound quality of them all, including Japanese audiophile editions.
Yes it´s so fun to find these cheap surprises. What a wonderful hobby this is : ) Good luck for all !