What year is this mythic "under $150 retail new" based on?
Oddly enough Inflation has had an eroding effect on the US$ over time, but there is handy tool to use to compare a past year's $ with today's $.

" The US Inflation Calculator measures the buying power of the dollar over time. Just enter any two dates from 1913 to 2019, an amount, and then click 'Calculate'. "

https://www.usinflationcalculator.com/

There is no "Bicycle Goodness Calculator" yet so that will be a manual operation.

-Bandera