I was thinking we could add nether wart shops. In other servers you could sell a stack of nether warts for 40k it seems a bit to op for mineverse but what if we did it for 10-30k? It would be really helpful thanks.
10-20k for a stack of netherwart seems a little over the top to me. Maybe like $150.00 per stack. I say this because netherwart can grow in any light level and with no water (provided its on soulsand), so creating a massive farm is unreasonably easy for the amount of money that you suggested. I do support being able to sell Netherwarts at the admin shop though.
You are probably under the impression that the nether is not mineable because of the large size of the protection on the so-called "nether spawn." Keep going as far as you can; I assure you, you can mine in the nether (and have been able to) since it was opened.
No they don't. Code: The growth rate is not affected by light or any other environmental factors. Source: http://minecraft.gamepedia.com/Nether_wart#Growth