The phrase higher-priced products is very common, but isn’t it grammatically incorrect?
The adjective higher is being forced to servce as an adverb here, so the phrase should instead be more highly priced.
What’s the verdict?
adverb, high·er, high·est.
- at or to a high point, place, or level.
- in or to a high rank or estimate: He aims high in his political ambitions.
American Heritage Dictionary agrees:
adv. higher, highest
- At, in, or to a lofty position, level, or degree: saw a plane flying high in the sky; prices that had gone too high.
- In an extravagant or luxurious way: made a fortune and lived high.