Does increasing your Insight unlock new items to buy from the Insight Bath Messenger?

In Bloodborne, I had 12 Insight and 12 Madman's Knowledge.
At first the Insight Bath Messenger had for purchase:
The bells for co-op + Pungent Blood Cocktails; and Father Gascgoine's attire, which wasn't very good.
I just defeated a boss...
the Blood-Starved Beast, which unlocked some okay attire
Which I bought, along with a couple of items, to drop me back to 4 Insight.
At 15 Insight, the difficulty increases.
So if I use up all of my Madman's Knowledge now, I'd be at approx. 19 Insight. Would that then make any new stuff available for purchase at the Insight Bath Messenger; to deplete my Insight level back down below 15?
Because I don't see a reason to keep a high Insight level; therefore I'm just stocking up on Madman's Knowledge atm.
Update: After reaching 15 Insight, I bought all of the stuff I originally didn't want, purely to get me back below 15...
Update 2: After buying some additional crap I don't need, to get the Insight back below 15; my Insight eventually got to 16 again naturally. I've decided against buying any more crap from the 2nd Bath Messenger, and trying out the game at a harder level... maybe it has some benefit? It appears nobody knows.....
Best Answer
No. The stuff the Insight Bath Messenger sells does not change regardless of your insight level. The only limiting factor of the Messenger are as follows:
- You must have 10 insight to unlock it
and
- The armor sold depends on what NPC hunters you have already killed
Sources:
- Experience
- Bloodborne Wiki
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What does increasing Insight do Bloodborne?
Higher Insight levels will increase the difficulty of the game because enemies will gain new and more powerful attacks. The player's vulnerability to Frenzy will also increase drastically.What happens when you get 10 Insight?
10 Insight makes the Insight Merchants in the Hunters Dream appear. If you go below 10 at any time, they will vanish again. At 15 Insight, certain enemies gain new attacks, and will look slightly different.How do you unlock the Insight merchant?
In order for the merchant messengers to appear, you must have at least 1 point of insight. Their inventory includes many items not sold by the Bath Messengers and will expand as you obtain badges, explore Chalice Dungeons and defeat certain enemies.Does Insight affect bosses?
It does not give them more health, it does not make them deal more damage, it does not change their movesets, and it does not improve their AI. It does not make your character deal less damage. This also applies to regular enemies except for the Cathedral Guardians.Bloodborne [Insight Bath Messenger]
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