Here is who I think the Flyers should be shopping between now and the deadline and also what I think they can reasonably expect to get for them:

Simmonds
At best if you add in one of their two 3rds, I think they can get a late first from a contender along with a conditional 3rd in 2020 if the acquiring team re-signs him and/or goes to the finals.

Raffl
Can possibly get you a late 3rd from a contender who is banged up on the wing. However a 4th is more likely

Weal
Can maybe get you a 6th from a team looking to add offensive depth. Could perhaps get you a 5th if they add in one of their 7ths

Folin
Can maybe get you a 6th from a team a looking to add defensive depth, though a 7th is more likely.

AMac
I just don't see anyone going for him right now considering the way he's been getting dinged up and with one more year at a 5 million cap and 5.75 million in actual salary. Maybe if they retain half, they can get a 4th, but that's about the best they can expect. Probably better off to just keep him for now and revisit moving him after the season.

Weise
Maybe, if they retain half, they can get "future considerations" ie someone taking him off their hands, for good old Horseface. I wouldn't hold your breath though.

And there you have it. Personally, I wouldn't be shopping Gudas as he's currently their only rh Dman. Lets see what Myers can do next year and you can revisit moving Gudas at next year's deadline, or if they are a playoff team and he's playing well, you just keep him at that point. Sometimes you're just going to lose guys in FA for nothing, it's not the end of the world. Finally, when it comes to the 2 vet goalies, forget it, no one is giving up anything for either of them at this point. That ship has sailed.