A $15 toaster is an appliance. A $1000, $2000, $3000, $4000 computer is not, it's an investment, unless he had plans to make computers for $15.
No computer is an investment. It's a good that will lose value with time. That's not an investment and should NEVER be thought of as such. You'd be an idiot to invest in something that is recognized to depreciate quickly with time.
One MIGHT argue that a historic computer like the Apple I could be seen as an investment but even then any decent investor would remind them that it's a very poor way to invest your money and the return isn't anywhere near as certain as traditional investments.
Please don't tell others a computer is an investment. It most certainly is not.