Yep I find to enable expanded I have to raise the sticker price considerably.
Plus when you enable expanded, mostly it allows third party sellers to list your book on amazon, undercut your retail price, and make more from each copy that you do. I switched it off when I realised what was happening.
E.g. (prices simplified, page count not specified.)
Regular distribution.
US retail price: $10
Amazon cut: $7
You make: $3
Expanded distribution: $10
Amazon cut: $7
3rd party cut: 2.70
Your cut: 30 cents.
Third party lists it for $9.50, all your readers buy from them, and they make 2.20 while you get 30 cents instead of the $3 you would get if you switch off expanded distribution.
Not to mention you'd have to charge about $14 on expanded distribution to get $3 back.
I always thought expanded distribution was about allowing people to order in bookstores, but sadly that's not how it works out.
Once I switched off expanded, all the third-party copies of my paperbacks disappeared from the product pages. I sell around 150-200 paperbacks per month so it's not pocket change.