With eBay will want to question condition with the seller if they don't list it. Invest in a LP cleaning machine also. As of my post here there are 133892 LP (3669 classical) listings and many of those are multiple LPs.
For all LPs go to: http://listings.ebay.com/aw/listings/list/all/category1071/index.html
For classical directly: http://listings.ebay.com/aw/listings/list/all/category1073/index.html
This site has classical 78s also.
If you are in Taiwan, here is an Austrailian site: