[hirundo]

Here's a sous vide cooker you can use with any pot for $45.

https://www.amazon.com/My-Sous-Vide-My-101-Immersion/dp/B071...

An ordinary ziploc type bag works fine for sous vide as long as you don't submerge the opening. I've used them for that many times. It's a bit awkward and takes a little more time, but no big deal.

[Shog9]

$45 is a pricey slowcooker; the last two I bought were $10 and $30 respectively - the latter has a removable ceramic container. A quick check for what's in stock at the local WalMart shows only 2 out of the 13 available running more than $45. Even the fancy "wifi-enabled app-controlled" Black & Decker is only $38

[justtopost]

A suis vide is much different than a slow cooker. I use both quite a lot, and they seldom overlap. The temp control is crucial.