Depends on the Peugeot. Got pictures?

Lower-end models (UO-8) are OK, with comfortable geometry and a good ride, but depending on your location, $100 is steep with no wheels. If it's a PX-10, that's another story.

Depending on how old 'old' is, you'll need French sized bars. Luckily, you've got the other annoying parts to get - particularly the BB. I'm not sure Campy made a BB in French thread, so maybe it isn't that old and there are no problems?