+1 for the Deutsche Grammophon LPs. They did a Beethoven Bicentennial Collection around 1970. I think it's 17 boxed sets. You can find the whole set or various pieces for sale used on the internet. They also show up used at half-price book stores. I have the two sets of the string quartets. High level performance and possibly the best sound available. Unbelievable value. You can find lots of fine artists on this label.
Starting a Classical Vinyl Music Collection
Don't have much so I'm wondering where to begin.
TIA