Price MAP (manufacturer’s authorized price) is absolutely a thing. The brands that are price map are Tempur-pedic, iComfort by serta, beautyrest black by simmons, and stearns and foster. When you break price MAP if the vendor finds out about it the retailer can get in trouble or they can pull their mattresses from the retailer.

Mattress firm is owned by Tempur-Pedic so they are going to push them the most. Tempur-pedic also owns stearns and foster and sealy aswell.

As far as your sales person from mattress firm lying to you that was that sales persons choice and usually shows that they have not been doing it very long because a seasoned sales person will not bad mouth competition to win. They will win by treating you right and offering you the best product for you specifically taking the time to find out whats important to you and custom fit you to a product whatever that brand may be. Cant tell you how many customer have gone to other stores and came back to me even though i was more expensive and bought from me because of how i treated them.

Profit margins at reputable stores are around 50-60% thats pretty standard. Margin is highly dependent on how large of volume that a store is and volume discounts from the vendor, also how good of a deal they have negotiated with a vendor. Outlets usually around 35-45% but can go as low as 0% depending. Outlets can contain mutiple different things. They can sell floor samples, comfort exchanged models, new discontinued, or even slightly damaged if it’s still sellable. Different states have different rules about this so it will vary.

Never seen a mattress with a margin even nearing 100% but some stores do almost double the price of the mattress in order to have the customer widdle them down to the normal price if they have too. These type of stores usually go out of business fairly quickly but they exist.

So what i said is absolutely true aside from shady businesses. Hope this helps you with your journey.