[thaumasiotes]

Listing wholesale prices on the product is vanishingly rare, possibly nonexistent. I wouldn't be surprised if it infuriated retailers to the point that they refused to stock your product.

Printing MSRP on the product happens all the time. Arizona Iced Tea is a prominent example.

[lostmsu]

Rarity of example os irrelevant. Producers have no need for that, because IRL stores generally do not have 50% markup on mass produce.