It's very very new. 2000-something. Chinese built, probably still has a Made in China tag down near the crank.
It's not this model in the current catalog, but it's closely related:
http://www.schwinnbikes.com/bikes/cruis ... hore-14727
As the listing says "Available at mass retailers only." It's a Target, or Wal*Mart special. 100% China-bike. Has several nice throwback features, like a one-piece chrome crank, "clover" sprocket, painted/chrome springer fork, and bow style pedals.
It didn't sell for more than $150 or so new. Used, $100 tops if everything's working and tires are like new.
I can't tell you exactly what model it is, it kind of looks like it was repainted.
The frame is regular butt-welded steel, and that little rear tab for the chainguard is a clue to the fact that it's not a Chicago Schwinn. The stick on black headbadge is another clue.
--Rob