A short walkthrough of the sections, filters, and badges on both camera databases -- and what each one actually tells you.
Both the Synology and QNAP databases split their catalog into sections. "Current" and "Legacy" reflect the current/legacy split explained in how Device Pack versions work -- legacy doesn't mean broken or unsupported, just an older support generation. "Great Value" (Synology site only, for now) surfaces cameras that score well on price relative to comparable cameras, validated capabilities, and listing evidence -- these are directional scores meant to narrow a search, not a guarantee any specific camera is objectively the best choice for your situation.
Brand, device type, resolution tier, and video codec narrow the list to the basics. The feature checkboxes below them (PTZ, motion detect, audio, and more, varying slightly by platform) let you require specific capabilities -- hovering most filter labels and feature badges shows a short glossary definition if you're not sure what a term means. The "Available on Amazon" and "Available on eBay" checkboxes are worth understanding precisely: they filter to cameras with a genuinely confirmed listing, not just cameras that have an Amazon or eBay link at all (every camera has some kind of link -- see below).
Every camera has a "Buy on Amazon" or "Search on Amazon" link, but only some carry a green checkmark "Verified" badge. That badge means a human (or an automated match later approved by a human) confirmed a specific Amazon listing is genuinely that exact camera model -- not a lookalike, a different revision, or an accessory. Cameras without that badge instead link to an Amazon search for the model name, since no confirmed exact match exists yet; that's a starting point for your own search, not a confirmed match. The "Available on Amazon" filter only includes verified matches, precisely so it isn't a no-op against the universal search-fallback link every camera already has.
Cameras showing an eBay price badge have at least one live, model-matched listing that isn't for-parts, not-working, or a multi-unit lot -- see Methodology for the exact filtering rules. Prices shown are pulled from listings at the time they were last checked, not real-time, so treat the displayed range as a reference point and click through to see current live listings before deciding on a price.
If you'd rather not use the interactive filters, both sites also publish plain paginated list pages (linked near the top of each site) and, for cameras with enough real content to be worth an individual page (a product photo plus a live purchase link), a dedicated page per camera with its full spec sheet. Those individual pages are the ones worth bookmarking or sharing a link to for a specific model.