Not very high, as long as I see the value in it - in terms of the tool alone, and what I'll do with it.
This is a luxury choice I'm fortunate to be able to make, and no shade to anyone who can't. I grew up with cheap *** tools, equipment, materials, vehicles etc. and while I learnt a lot it was pretty frustrating for everyone. I'm still young enough to get a long period of use from tools I buy.
It isn't the top reason, but I'll generally pay more for companies that support my view of how things should be in the industry and the world in general. Innovating, not taking advantage of people or ripping them/rivals off, being there for the long run, supporting countries and cultures that are aligned with my own, etc
I'm from country that's taken a huge downfall from when it led the world in making and innovating in so many fields, so this partially informs my views. Think, if everyone made their tool buying choices like you do, where are we going to end up in 50 years?
From the OP's list, COO yes, brand loyalty no, perceived quality yes, peer pressure no, reputation yes. Regarding peer pressure I'd actually be more likely to hear comments from less informed people for wasting money on "fancy tools that just come out of the same factory", and advice like "you could get a whole set of pliers from Amazon for the price of one of those Knipex".