Staples SPL-250 10 Digit Calculator

What is this?

A calculator that supports 10 digits - which is important.

Why did I buy it?

Back when I was selling Manhattan real estate I would often have to do calculations involving millions of dollars and realized that my previous calculator couldn't handle all the numbers. I like pressing real buttons when doing calculations, so while the iPhone can handle way more than 10 digits, I prefer to go this route. 

That said, if money was no object I would go back to my TI-83. Man, that thing was the bomb.