You know how I know you're not a Buffy fan? It's Sunnydale, not Sunnyvale. And Satan never came to Sunnydale. The 7 "big evils" were (in order) The Master, Spike/Drusilla/Angel, The Mayor, Adam, Glory, The Triumvirate/Willow, and The First. Dracula also made a visit, but proved to be a bit of a nancy boy. But Satan never visited Sunnydale. The Beast (who was the only real Satan lookalike) only ever made it to LA, and only in Season 3 Angel, and Buffy never confronted him..

I think I'll stop now, while I still have some people fooled that I have a life... :-)