The complete GBA games are already expensive! How come fire emblem is one of those extremely fast price rising franchises? Do you think the same on the 3DS games? Because I might want to buy 3/4 copies and keep them sealed!
It wasn't very popular back then, but since got a surge of popularity. So it didn't sell too well so there's not as many carts out there, but now there's more people that want them than there are physical units.