I don't scoff at the rumors (I think I started that thread...) but I don't treat them as real either. There is more meat on the stuff that's been posted tonight, but on Rosenthal's original tweet, "sources" could be just about anything. It's highly unlikely they were primary sources (i.e. the Orioles are not directly feeding Rosenthal accurate info about the offers they have received, and the Phillies are not doing that about the offers they might make). It's gossip, and also counterintelligence. Maybe the Phillies have had the best offer all along and the Yankees/Dodgers rumor is to get them to overpay? Maybe the above was meant to get the DBacks' attention. Maybe Machado prefers NY or LA and his agent is the source.
I'm all for the trade though. As a board, we tend to overvalue prospects. Heck, i might even trade Sixto (he probably can't pass the physical right now anyway). There are just five diferent things that are special about Machado that make him more than just a rental. One is how good he actually is. Two is how well this front office knows him. Three is the chance to keep him. Four is the legit chance to win the division and play in the NLCS, we are not talking about a wild card run at this point. And I guess Five is the "splash" factor which I wouldn't count too heavily but it certainly doesn't hurt.
Also, you have to consider the alternatives. Moustakas may not be better than Franco. Beltre can block any trade. Merrifield might actually cost more than Machado. And just adding a platoon RF doesn't move the needle.
I think I'd rather trade three prospects than two plus Crawford because I do think Crawford will be worth two prospects himself, if Machado stays and they are ready to move him next year. Same for either Kingery or Hernandez. Having two extra major league starts lets you replace minor league depth.