What to do with a VIC-20? (opens in new tab)

A family member was nice enough to get me a Commodore VIC-20 for Christmas! I grew up writing BASIC on an Atari 400 (despite being born 12 years after the release), but have always want to get my hands on a Commodore. The system needs a bit of work before I can use it though. First thing is a power supply, which shockingly seem to be $80+. I also need a video cable, but I think my Sega Genesis one will work (it fits at least). The "0" key is missing on the keyboard, so I think I'll need a new...