Sales & Negotiation Tactics to Up Your Trade Game?

Trading is a huge part of what makes dynasty fun but it is also the most frustrating. Nothing's worse than when you're right on the edge of getting your guy but just can't quite get a trade partner to pull the trigger. I could be thinking way too deeply about this, but I think understanding sales and negotiation tactics could make a big difference. Not just for landing your guy but also when you need to offload your mid-season pain acquisition.

Does anyone have advice or book recommendations on sales or negotiation strategies that could help in trade situations? Stuff like how to frame an offer, build trust, or recognize when to push or back off? Would love to hear thoughts, favorite resources, or even success stories if you’ve used this kind of stuff.