What life changing item can you buy for less than $100?

as many clocks as $100 can get you

1,874 condoms in Russia. Prevent 1874 abortions!

A whole bunch of gallons of reverse osmosis purified water at your local Walmart

A radio with 2 speakers.

A printer to print out the book you have been working on.

A bicycle to exercise your dog with.  Sunshine & fresh air for both of you.

$100 towards supplies for a new hobby

A pair of shoes/boots that fit your fancy.

If you don't have a dog, adopt one, they are life changing.

You can buy all the Tool albums. 

Registration to a furry convention.  Of course, getting a hotel room and food for the weekend will cost you a bit more than that.  My first furry convention was a life changing experience because it opened me up to an amazing community of creative and talented people and I started making such wonderful friends.

You could buy a notebook. 

A box of condoms.

Psilocybe cubensis.