It better not go in a kit. Next thing you know, people have a hundred of them and the economy is flooded.
+1 Should be pretty high though. You think they go for what 200-300k atm? If you do a 1.1 ECD - 1 exp ratio. Which some shops sell for (Should be more to not make a exp price ceiling. It would be upwards of 220-360k
Not really much of a point now that there's a legitimate supply of these. With an actual market you have to set prices that don't compete with it, meaning elytra would need to be pointlessly expensive (500k exp min). Anything lower will create a price ceiling for Elytra that doesn't allow the market to breath. The EXP market is healthy enough where simply saying that this would be an EXP sink is no longer proper justification.