: eBay and Amazon (used section) are the largest sources for rare or out-of-print titles.
If you are looking for places to shop, enthusiasts on Reddit and resale experts suggest: where to buy old dvds
There is no "proper" article to use before "old DVDs" because the phrase describes a general category of items in the plural form. Why No Article? : eBay and Amazon (used section) are the
: Check local thrift stores , pawn shops , record stores , and Goodwill locations. and Goodwill locations. : In English
: In English, you don't use "a" or "an" with plural words.
Use only if you are talking about a specific, previously mentioned group of DVDs.