Where: To Buy Old Dvds

Use only if you are talking about a specific, previously mentioned group of DVDs.

: Vintage Stock and Movie Trading Co. focus specifically on used entertainment media.

: Services like Zapper and World of Books specialize in pre-owned media.

Example: "Where can I buy old DVDs you mentioned yesterday?" Where to Actually Buy Them

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?