Good point.The selling side of things is gonna be such a ball-ache (see C19).... In simple terms:
Bigger/richer clubs: We have no-one for sale that they'd be interested in buying.
Similar level clubs in other leagues: We'll have very few players for sale that would interest them anyway... Likely to be less cash rich than their EPL counterparts and thus probably not worth us taking a sizeable hit on the fees anyway (See e.g. Dele... Or even players in the 20m bracket e.g. Lamela)
Lesser/poorer clubs: Best chance of us shifting the bulk of our deadwood, but equally even more likely to be skint than we are.
Will undoubtedly be a very tricky transfer window. I’d like to think we are in a slightly better position than some, but as you say, shifting some of the deadwood will be some task.