It's completely fair to compare prices when you're on the buying side.
It's also strongly recommended when you're on the selling side, as you should be prepared to explain what added value justifies that your product is so much more expensive.
Why would I care about that as a customer though? If I compare options, I look at price and performance. If one is making it harder for themselves without any added value for me, why would I pay more money for that?
It's also strongly recommended when you're on the selling side, as you should be prepared to explain what added value justifies that your product is so much more expensive.