priceindex is an attribute that is applied to priced items that share the same definition index and
For most items, it is zero. Otherwise, the use varies by context:
For items with particle effects, the
priceindex corresponds to the ID of the particle as documented in
the web API.
Dual quality IDs are bit shifted by 16.
priceindex corresponds to the crate series.
priceindex of a Strangifier corresponds to the definition index of the item it can be used on.
priceindex of a Chemistry Set is a hyphen-delimited string of two numbers; the definition index
and the quality of the item. 1086-14 is the
priceindex for a Collector's Festive Wrangler.