To keep the economy healthy in P2P and not have everyone owning d longs and d axes on Day 1, both items should be locked behind NPC drops only. They should never appear in shops. It means the R2H is a better weapon for longer and adds more value to the dragon weapons. Put them as 1/1500+ drop rates behind black demons, 1/3000 on blue dragons etc. like the d med. It means the game takes a lot longer to 'complete' and adds a greater challenge to each player (and the whole community) post-P2P.
You could even block the drops until people complete both quests to make it so people can't just 5IP easily with reg accounts - make them do each respective quest to access the drop tables.
Being able to buy both in shops for a relatively low value kills the economy and the excitement of the game.