This is why i hate these auction programs on TV. They don't take transport, VAT or selling tax when they work out how much "profit " they have made.There's never 100% Profit in my opinion TBH.
There's always a cost either financial, time,transportation or commissions .
Let's say we make an example really quick .
I've got an object for free .
Where I was surely not home ,so the fuel and the time to purchase the item it's already a cost.
I found something ,take it home , clean-up and put on selling.
How much I've spent
Transportation
Clean up even if with a wet rag
Put on eBay , we have to pay a commission
The time spent in those operations.
Storage time as a cost even if laying on your kitchen floor ,it has a cost cause it's taking you space for something else.
Anyways you'll never get 100% profit
NEVER