Coming from a shop employee... (I hope you're not planning this). Don't just use your local shop's time sizing your foot and trying on boots. To just go order online. Its like the biggest insult to us. At least be purchasing some of your gear there bindings or board or Boots
As for Nike. Their boots stiffness and pricing aren't parallel. Vapens. Kaijus zf1. ITES.(variable.). Stiffness. Low to high
Vapen zf1 kaiju ites. Prices.low to high
Kaijus are closest to a mid flex.
I worked at a shop for a number of years and I didn't find it insulting unless a customer was implying that he was going to buy a boot with us, tries on every boot in the store, and then walks away.
It's not like shop employees make commission.
If a customer comes up and is like, "hey, I know exactly what I want, let me try on these specific sizes of these specific models, you don't need to sit here and watch me do it unless you really want to," it's whatever.