I worked for a guy who had the exact same idea ten years ago! Never figured out how to execute on it though.
What I have seen people do recently is focus on a single vertical such as say used cars or hardware stores. You could start regionally and if you can make it work in say three cities you might be able to raise the kind of money it would take to go national.
Me too (more like 2 years). I figured RFIDs would be involved. I thought of it as soon as I heard Hong Kong Airport used RFIDs to track baggage. Didn't work on it because it seemed too big.
What I have seen people do recently is focus on a single vertical such as say used cars or hardware stores. You could start regionally and if you can make it work in say three cities you might be able to raise the kind of money it would take to go national.