I'd rather deal OAs who are guaranteed to not return, rather than 2000s. If you told me the team was dealing Angle, Corcoran, and Purboo, I could accept that.
Barring any requests to be traded I don't think any of our OAs will be moved.
Boka, most game by a Spit on the line, he's not going to be dealt unless he asks.
Purboo, with the abundance of OAs out there who can score and contribute more he won't have a ton of value. Looking at the Struthers deal he won't return that.
Stevenson, has no value in a deal and Bowler seems to like him.
Of Angle/Douglas/Corcoran Angle is the most likely to be returned. He was late Bday draftee so Columbus has two years to sign him yet you're willing to move him over Douglas who may or may not return but I think Dallas knows they'll never know what they have in him until he's out of the OHL. I can see him signed and in the ECHL next year but you want to keep him. Corcoran should sign and move on with a slight chance even if he signs he returns. If he went AHL he would have a familiar face in Rocky Thompson coaching him which is part of the reason why I could see him getting signed.
Afanasyev is in a bit of a lull right now. If he picks things up, which he likely will he probably moves on since he is AHL eligible next year. He would carry the most value of the 00s/01s and bring the biggest return but keep him.
So move one player who would bring a decent return, not the biggest available and move the one player who is more than likely back for an OA year while keeping the two who are more than likely gone? Minimize the return while reducing the competitiveness of the roster. That's asset management.