Keep in mind non of these sites pay me. These are just the best sites I've used during my time in the rep game.
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Best Shipping Agents
https://www.allchinabuy.com/en/
https://mulebuy.com/
https://www.lovegobuy.com/
https://www.acbuy.com/home
https://www.cssbuy.com/
https://cnfans.com/
Finds.ly
Finds.ly is essensially the new QC finder,
Simply enter your desired seller link and finds.ly will search every agent to provide you with real photos of that seller link
Also they offer a lot of cool finds for FREE, keep in mind most of there items are not 1:1 to retail.
JadeShip.com
These are my favorite tools :
Link Converter
Best Items
Settings Icon --> Preferred Agent
Reddit.com
If Kor did not exists I'd be using reddit as my main source of new finds.