Wholesaler
I am a wholesale guy by trade. Dealers buy product from me to resell.
First off we need to consider the GPM, that's the gross profit. The dealer discount varies by manufacturer. Some manufacturer's publish retail pricing, some others do not.
I don't "do" consumer goods. In the case of consumer goods invariably the manufacturer does publish a retail price.
In many cases that published retail price may be a fantasy. It is typically what the dealer discount is based upon.
The consumer sets what I and many others refer to as the "street price" IE: what the product actually sells for at "retail"
The dealer discount might be 40-50 percent off the list price. That does not mean much when the street price is far lower than the list or retail price.
Can't make a level playing field, like many small dealers "wish for" since the golden rule always applies.
He who has the gold, makes the rules.
Bud's or CTD will get a better price wholesale, their wholesale representative will discount further based on volume. Perhaps an extra 5 or 10 percent. They have the "gold" to buy 100 of that model. and price it to the consumer based on that Addl. discount. Thus the street price that the mom and pop can't match.
Mom and pop will focus on all the things the above retailers can't or won't. Service and accessories of course.
Computer hardware is similar, no margin in the hardware, the sellers make their money setting them up and maintaining them. Most don't really care where you buy the hardware as long as it's good quality.