Bought 2 in the past 6 months. Paid $75 for hub only and I was planning on using it until I found one laced to a chrome S-7 rim for $100 which was what I wanted to do with the first one.
I have paid as little as $2 for a complete bike with the 2speed, and as much as $50 for a hub only.
I have had several overhauled by the local Schwinn dealer for $35 each....support your LBS.
The Bendix Automatic is a great way to ride.....once you get familiar with them.