Very simple, since gift wrap doesn't work on untradables anymore, so should prices for non tradables should be invalidated?
Untradable items:
https://gyazo.com/bf9ce6b5b5921bdf15c843560627bf8e
https://gyazo.com/58e00fdf851889073be545ce92a02ce7
https://gyazo.com/4e86baec7dc30eaaaa45fe76d934a86b
https://gyazo.com/94965f52047ed0bd19582937253861ab
https://gyazo.com/51c86b42c81ac64f20386eff8f84e9a6
*Edit* I agree with Pyotour that halloween spells to should be invalidated,