very nice darklord, got it working first go
Atheuz, i hate to be a bother, but please explain out the duping as much as darklord did, so far none of us have been able to replicate your duplication (lol'd), so i'm thinking it's something you forgot to say. I've been going at it for quite a while now and all to no end
here is my contribution, the sought-after claybeak bug:
1. Accept the quest, must be in a party of 3+
2. Get some of the feathers and drop them all, continue this until the quest log glitches and says 3/3 3/3 0/3 or something like that, even though you have like 4+ of each feather, should only take 1 or 2 drops
3. kill claybeaks until your inventory is full (minus 1 slot so you can get the reward item)
4. abandon and retake the quest to unbug the quest status
5. get an auto-mouse and have it turn in the quest for an hour
6. sometimes you wont be able to retake the quest after turning them in, re logging fixes this
EDIT:
ok, to make this a bit easier on atheuz, tell me what i'm doing wrong instead of posting your step-by-step
I create a shop, put 17 of an item in, scan for exact value "17"
Close shop, open it again and put a different number of items for sale and scan for increased/decreased value by x
Put my item i wanna dupe in, open shop, change value to negative, then purchase
it does NOT give me items back
note that i edit AFTER opening the shop, if i make it - before opening, it says in the log "Cannot open shops in a PK zone" despite being in a safe zone, and i cant open it