I have these types of conversations constantly in my leagues. Keeping open lines of communication with other owners and gaining a reputation for being unbiased, honest, and informed has been crucial to my success over the years. You want to have an ear to the ground in your leagues, know what players are for sale, what feelers are being put out, where other owners stand on players whether the two of you even own them or not. Now I'm not saying you should use the info you gain while giving advice to cut in and steal trades or anything. That would suck. But you want to become the natural, logical first stop other owners make when they want to bounce trade ideas around, whether you are involved originally or not. That has led to so many unexpected deals over the years for me.
So many people hold their cards close to their chest, don't want other owners to know who "their guys" are, don't want to be perceived as a shark lest owners look too deeply into the players you are trying to acquire just because you are interested in them...in my experience, that's all BS. I play in pretty active and knowledgeable leagues with very active chats and constant trade chatter, so maybe my experience isn't universal--but I've found it's best to assume everyone has all the same info that you have. It's all out there, most of it is free, and if everyone in your league cares, you can't depend on having an information advantage, so there's no need to interact with other owners as if you DO have that advantage. You likely don't if you're in a competitive league. So treat other owners like they're as smart as you are and find deals based around differences in values, roster goals, etc. rather than trying to be the secretive hyper-competitive guy who either tries to play people, or constantly worries about being perceived as trying to play them.