Parts are engineering intermediates that price as ore plus crafting time, hugging their material floor. Within Tradeskill, the Parts subtype gets its own tracked table here. Each row below carries its own price-history page rather than sharing a single blended entry.
Parts listings clear and replenish at whatever pace the in-game market sets; some subtypes trade in volume, others sit static for stretches. The price-history chart on each row's detail page makes that pattern visible at a glance.
If you want the full Tradeskill category rather than only Parts, the breadcrumb above steps back up one level; otherwise the table below covers every tracked item in this subclass.