Since the topic just came up and it always bothered me, ... lets talk about the amazing feature of making costumes.
For those who don't know; you can make any gear costume in prontera: the downside is tho it cost you 10c.
I know it's seen as a "coin sink" but I also want to put it in a relation here. Let's say you really like the Poo Hat. That's basically a free gear. Now you want to costume that.
let's assume a coin priceof 85m. That me and you need 850m (if you buy and not donate... donate be even more ridiculous 10€) just to make that a costume with no other benefit then make you look sexy.
I know it's a sink.
My point is tho, you can't assume everyone has a fortune. I'm pretty sure 90% of the players are more "newbie"ish, therefore that feature is totally locked from them since they better off focus on important stuff.
My suggestion:
Make the costumer Tier like l. You still can keep it as sink but it's in a realistic relation.
Tier 1: Normal Headgears, things Monster drop, Quest gears, NPC sold - 1c
Tier 2: Event headgears - 5c
Tier 3: Donate shop headgears, Amberknight, Donor box - 10c
Kthxbai.