A decent citybike can be had for ~CHF250 used or ~CHF 600 new.

an entry level road bike can be had for ~700CHF used or ~CHF 1500 new

a decent road bike can be had for ~CHF 1500 used or ~CHF 3000 new

a high end road bike can be had for ~CHF 3000 used or ~CHF 6000 new

horses for courses.

She is asking for a city/leisure bike, not for a racing one.