^^^This. The most expensive boot you can buy is the online "bargain" that gets replaced sooner than later due to improper fit. Do not buy boots online and this goes double for someone buying their first pair of boots.
Also, custom footbeds are a must and should last thru several pairs of boots, so we are talking lasting decades for most skiers.
BTW,
@DerKommissar, your instep measurement of 7.7cm is incorrect, lilekly do to incorrect methodology. To properly measure the instep, take a length of string and start the end of the string at the back of the heel at one side, then run the string over the highest point of the instep, terminating at the back of the heel on the other side of the foot. If the length of string used to complete the measurement is longer than the foot's length, then that is considered a foot with a high instep.