My take on the transfer portal pecking order:
1. Top targets are the award winners and big stat generators from "lesser" programs in Power 4 that can't pay the bills, with the subcategories
a. as many matched playing cards as possible (i.e. guys who played together, QB and receiver, 3 O-linemen, etc.) - I think this happens when a new coach brings the team with him
b. Potential draw for other players
2. Next would be 4 and 5 year seniors at the "less skilled" positions (i.e. linemen, but you're getting size and experience)
3. The top "next level" players from D2 (across all positions).
4. 1 or 2 year transfers from "name" schools, broken down into subcategories
a. Had a decent amount of PT
b. Evaluation shows their skillset wasn't being used to the maximum in prior system
5. Passes the eye test or evaluation (let's call these "diamonds in the Rough")
6. Bargain basement buys