Update 2: Back in stock, and now even cheaper at $15. Thanks, @iamitava.
Update: Sold out again.
It might not have the panache of the Dremel brand, but this inexpensive WEN rotary tool is actually the top-selling item in its category on Amazon. That’s largely due to its low price tag, but it also has pretty solid reviews, and should be a great help for most home improvement projects for an all-time low $16.