My local electronics repair shop has a minimum $50 charge. So $175 seems a bit high to me as a minimum, but I suspect location has a lot to do with it. $175 could be very reasonable in your area. Call around?
Having said that, as far as I can tell, these guys aren't exactly driving home in Ferarris to multi-million dollar houses. You have to pay the rent, invest in equipment, meet payroll obligations, pay benefits, etc. And a lot of the times, I'd guess they're probably waiting around for work to do as most electronics don't break very often, and when they do, the cost to repair may not look very favorable versus the cost to replace.
Either that, or these guys are so busy making bank on the repairs that they're already doing, it's not worth their while to do anything for less than $175.