at my local shop we charge $10 if you have 2+ items bought there. (skis & bindings, bindings and boots, you get the point)
$50 for only 1 item bought from us and $75 for none.
For one, it covers the cost of getting certified for the technician each year and it promotes buying local instead of online. I understand some things people want to get online because its on sale for 50% off or we just dont carry it since we can't carry all the manufactures, but we have a large enough selection that would satisfy what they want in a ski/boot/binding. If all else fails, we can order in shit for them from the manufactures if its not to late in the season.
What I'm getting at is that if you dont want to support the local shop by buying skis there, thats fine but you will have to pay for it when it comes to mounting, and if you do support us that way we reward you in a sense by offering super cheap mounting services. We have never really had any problems with customers complaining about it when it does come to the fact that its $75 to mount though.