I assume you're talking about an older one? If so $50 for a clean one, particularly if it's a cro-moly frame with Shimano 600 ain't bad.
If it's a new one (Schwinn has re-introduced the name, I believe) it's not a quality bike at all but if it works you can't go too wrong for $50.
If it is a vintage LeTour ask this over at Classic ad Vintage also.
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“Life is not one damned thing after another. Life is one damned thing over and over.”
Edna St. Vincent Millay