Depends on which model you want...
As low as $15,000 I've seen for S-1Cs with 160hp motors (and most likely need reragged and umteen other things done) to bumping $200,000 for a new-built S-2C from Aviat.
I'd like to find an S-1S. An S-2C is a dream that will have to wait a few years for my income to grow into it. That second seat is expen$ive. A Model 12 would be nifty too. So many choices...
I'll probably be getting my feet wet with most likely an S-1C with hopes of an S-1S.
Mars can give you much better information about them than I can