The Sonoma CN1 sounds like an interesting bike.
Stock Photo:
Nothing particularly extraordinary, but not a bad starter bike.
If it is in decent enough shape, the groupset may be worth more than the $150 asking price.
I'm not seeing an age. Perhaps around 2005?
Do you have your height, and the bike size?
Anyway, if it is in good shape and FITS YOU, then it wouldn't be bad.