Its mostly an informed guestimate from spending time in bike stores and seeing what other commuters ride. But here goes:
In 2014 the average retail price was $714 nation-wide (https://www.statista.com/statistics/276088/average-retail-pr...) around here in Portland, OR people tend to prefer fancier bikes, the shop I worked for in 2006 had an average retail about $1700 back in the day but that was a higher end speciality store. In recent years e-bikes have gotten extremely popular here, their retail prices range from $2500 and up, skewing the average price point up further.
