1. The Goodwill Outlet ("The Bins")

This is the final frontier of sourcing. Items are sold by the pound (usually ~$1.59/lb).
Strategy: Ignore glass and heavy electronics. Focus on "feathers"—Lightweight items like silk scarves, vintage t-shirts, and plush toys.
Example: A 4oz vintage t-shirt costs $0.40 at the bins and sells for $30. That is a 7,400% ROI. Speed is key; wear gloves and dig fast.

2. Private Picking (The "Knock" Method)

The best inventory never hits a store shelf.
The Script: When you are at a garage sale, ask: "Do you have any video games, old toys, or hunting gear you didn't bring out?"
50% of the time, they say "Yes, it's in the attic." You get first dibs on fresh inventory with zero competition.

3. Retail Arbitrage (RA) Scanning

Download the Amazon Seller App. Go to Walmart/Target clearance aisles. Scan everything.
What to look for: Discontinued cosmetics, specialized lightbulbs, and seasonal candy. These are "boring" items that people are desperate to find on Amazon once they vanish from shelves.

4. The "Death Pile" Rule

If you buy it, list it. A "Death Pile" of unlisted inventory is just cash you set on fire.
Rule: Do not go sourcing until your previous haul is 100% listed. This forces discipline and keeps your cash flow positive.