I made a thread a few weeks ago about this in the API subforum but I think the problem goes beyond the API so I’ll post it here too.
This item (Ghastly grinning shield, ID 36332 – the actual shield, not the skin) has been bugged for over a year now. It does not show up on the trading post unless you untick the “Only show available” filter despite there being shields available.
Here is a link to an imgur album showing the bug ingame in action.
The sell listings aren’t tracked by third party sites (comment courtesy of a redditor):
“the commerce API returns “no such id” for 36332. That is the reason they don’t show up on the sites you mentioned. According to the API it doesn’t exist.”
http://www.gw2spidy.com/item/36332
https://www.gw2bltc.com/en/item/36332-Ghastly-Grinning-Shield
https://www.gw2tp.com/item/36332-ghastly-grinning-shield
The rest of the halloween items are working as intended.
~ The Server I Play On Is Better Than The Server You Play On ~
- Kudzu, Dreamer, Frostfang, Eternity, Flameseeker Prophecies ~
~Nevermore, HOPE, Moot, Incinerator, Meteorlogicus, Howler ~
Is someone attempting to fix this? Because over night all the listings + buy offers in my screenshot (even the low 1g ones) are gone and have been replaced by a single 1800g bid.
~ The Server I Play On Is Better Than The Server You Play On ~
- Kudzu, Dreamer, Frostfang, Eternity, Flameseeker Prophecies ~
~Nevermore, HOPE, Moot, Incinerator, Meteorlogicus, Howler ~