I don’t know how the laws differ in your countries, but over here it is OK to publish your price and tell others what it is.
I know, It is not illegal here in the USA too. I was just referring to another thread here - some site point admin said it is illegal (closed the thread too).
As long as a group of people (competiors or not) conspire to come up with a price schedule (does not have to be the same pricing) there is nothing illegal about that. You can ask and tell others what the maket rates are for any product/service.