What rental item has the greatest (Return on Investment) ROI?

I'm thinking about purchasing some items to rent out online and I am trying to figure out what item will give me the greatest return on my investment.

Sorry. Just what could you rent online?

The best rental item is money - which is usually called a loan. However, you must equate risk with what return you are anticipating. You must make that determination. If you don't want risk, try investing in government bonds of the Treasury variety.

The cost to ship out and return and the actual cost of renting some thing could be quite high to a consumer. I live in New York and there are rental places where almost anything can be rented. I myself cant think of anything that could be rented on line that I couldn't pick up locally. If you have some thing truly unique to rent then that's a different story. I wish you the best of luck.