RCA Classic Records-180 versus 200 gram

180g should be better if they were from the original masters however in most cases the original pressing is better with more air. This being said i would never buy lps on ebay i tried twice and got pure crap both times.Good luck.

The originals are pretty good, but many have very noisy vinyl and if you do find a good one, it will take a long time because most are in horrible condition.  The classics are very good.  I am very lucky to have the ones I do have.  These were done with care, very rare these days

Original in prime condition is way to go. London FFss, RCA shaded dog... No 180g or 200g will compare ever. Also check 80's 45rpm Angel releases. Not sure how heavy they are, but sound is fantastic. 

I do not agree.  I understand what you are saying but many of these records are so damaged and worn. To find a playable copy is difficult.  The London/Decca recording are fantastic, much better than the speakers corners but the rca shaded dogs are very hard to come by in playable condition.  eBay is a crap shoot.  The classics are very good and the engineering was done on many of them with the original engineers present during the mastering.  The local used record store never have classical  the record shows do not either.  Some of the original RCA's, if in very good condition are amazing, agree.  But find them.  You could pay a large sum of money and get garbage. If you find a mint copy of the reiner pines of Rome, and it is not 100.00+., by all means, grab it