Look what I found at our local thrift store today - a brand new (still in the package!) Yolife yogurt maker for only four dollars!
I have always relied on the warmth of my oven light when making my own yogurt, but the temperature isn't always consistent, and this way, I don't have to worry about accidentally turning the oven on and ruining the whole batch (something I've done more than once, despite my best efforts).
My favorite thing about this machine is that if I want to make more yogurt than the 7 glass jars will hold, I can just use the taller lid that came with it, which allows me to make a bigger batch using my own, larger containers.
Pricing them online, it looks like I saved myself about $46. Sweet!