I know but unfortunately there seems to be no copters in that unit set...my bad should have thought better.
Still it does make sense to be able to scrap units. You'd still be getting their halved price next turn so much longer strategy to make use of the money.
Perhaps only with expensive units...such as convert a full power (3 hp) rocket launcher for 2 credits when its original price is 4 credits...things like that.
Just an idea. How could u scrap a bunker, which costs 1...for example with 1 remaining hp...get back 0.25 credits halved meaning 0.125? No way