I'm guessing Trotski's $75 price is based on walking in with gear bought elsewhere, so Finn, if they were charging $75 it would be BECAUSE you didn't buy anything there.
How many times have people on Epicski posted this line: "I buy stuff on eBay because I don't think B/M shops provide enough service, I'd rather save money. Maybe if shops provided something more I'd shop there." How about $75 worth of labor FREE if you buy from us?
I'd say that $75 to mount gear brought in from 'somewhere else' is going to become pretty common. It will allow ski shops to show 'value' to their customers and make some money off of internet customers.