[Snowball]

I run 70 pots with my mules and the wild onion crop is very low.

WHOAH! That's A LOT of pots!!
Just how many mules do you have, and how many pots do each of your mules have in their mog houses!?

You can't buy from NPC, but if you check bazaars you will find some people dumping them at a low price to clear slots in inventory.

Well so far, I haven't really seen anyone selling them on Fenrir, but one place I CAN try, is outside the culinary guild. Players are sometimes hanging around there selling things in their bazaars, so I'll check that out at some point I think.

I suppose I could also send out a /shout asking for them. That might work too.

At AH, bid 400, even if going rate is 700, you might find the same situation where someone only has 1 or 2 taking up a needed spot so they want it to sell quickly.

On Fenrir, they're selling for about 1k for singular onions (as oppose to a stack) in Windy at the moment. I have bought myself a couple to add to the 6 I already have. Just need to find a way to get the rest without having to buy all of them. Maybe this is where my thf comes in, though as I've alrady said....
I'm not very positive about it right now..... well not until I have re-tried it at least.

It's a fairly common drop from gobs, worth the effort even if it's not EXP..chance for gob armour helps also. The secret is patience, don't let one minor difficulty hang you up, you'll go crazy !!

Gob armour?? Well I know I can't wear it. So it won't serve a purpose in that manner.
I'm guessing that it could probably be used for crafting instead. Is that why you mentioned it?