This isn't MTG where half the game is throwing money at it. The metagame is list design. He doesn't physically have that TIE but he still designed that list. You're giving him no advantage apart from saving him from being a tenner out of pocket.
MTG still can be about list design, that's the best part of it. Any idiot can buy a netdeck and learn to pilot it, the trick is throwing the curveballs.
But the CCG format hampers that in that it becomes a financial arms race, one WotC is very aware of and thus deliberately prints TIE advanceds as fluff.