Did you guys take out the 9 different clicks you need to make to even get it?
I can get 9 fishies in less time and with less zeny I bet :D
Anyway my suggestion would be this if it hasn't been done already.
You talk to miracle man, he says
"Want to see me turn water into whine with a holy water?" Or something of this effect. You say yes, he can then ask how many you would want and he'll do up to like I dunno let's say 99 or something per chat. Would make it more worthwhile and probably not too difficult to fix the script to accommodate these changes.
Main reason for the price to be lowered is that it needs an empty bottle already that needs to be hunted, then converted by a priest, then by a npc :x??
Something fun that could be done could be to make it free, but having 5% chance of failure with :D??It says *The npc quickly hide your holy waters under his cape*??, then the npc says "oops, sorry, it cannot work everytime ):"