I would take the Tempo as well. I love my Prelude, and it's a little further down the line. If it's in really nice shape and ridable I'd pay $200 at the absolute most. Miyata, especially over a Schwinn? The upper model
Schwinns during that period were very nicely made and rode well. We're not talking Varsity's and Collegiates here?,,,,BD

My lowly Prelude in Columbus Tenax. Damn near the nicest bike I own. If the Tempo is nicer than this, it truly is a sweet ride IMHO.