Criteria:

BSR below 500,000

Minimum 40% ROI

Minimum $5 profit

Minimum 30 drops in a month

At least 3 sellers.  Not more than 35

No grocery items

No pet food

No IP Claim / Hazmat / Oversized products

Avoid multi-packs

Tools:

Keepa

SellerAmp

The process I've done to get good leads was:

Analyzed the criteria

Search for products on Google (I used Reverse Sourcing)

Using SellerAmp to find good products to sell on Amazon

Analyze data of the product on Amazon using Keepa and SellesrAmp tool

If it's a good product, I will put the details needed on Google Sheet

These are the approved products I've researched and checked by our mentor.