Margin on speaker sales by high end dealer

But they don’t make 40-50% net profit. I believe this has been discussed before, and there are many costs to run a dealership. Thus, even if they made 40-50% gross, paying daily/monthly/yearly costs with every sale to keep themselves in business, the net profit is much lower.

There was a long thread on this a few weeks ago.

The post is about margin, not operating costs below this line.
Further it helps to understand this as a way to further understand credits offered for returning product when upgrading.
As a consumer upgrading can be very costly, and negotiating a return credit can be a challenge. This is part of the business model and a dealer making profits from returned goods can be lucrative.
Getting good deals is part of a buyers process while respecting a sellers ability to receive a fair profit.

Asked and answered many times over in the thread below and other similar threads

https://forum.audiogon.com/discussions/mattresses-not-stereos-is-where-the-money-is/post?highlight=margin&postid=1831963#1831963