It is almost impossible to get a seat to some games at Subiaco if you are playing the Eagles. North Melbourne had to stop selling NMFC memberships to WA NMFC supporters that provided them with a seat at the Eagles game due to reaching the number of allocated away club seats the club had been given.
Currently if any NMFC supporter wants to go to the Rd 6 game at Subi and wasn't lucky enough to get one of the WA NMFC memberships then they have to try their luck at buying tickets when they go public on the 23rd. I and 3 friends have booked to come across to Perth from Melbourne for the rd 6 game, but if we can't get tickets then we have paid for flights/hotel/car hire for nothing. I don't know any other stadium that this occurs at in Australia!
Just make sure you're online at 9am WST on the Monday 2 weeks before the game and you'll be fine.