Explosives and devices come out of engineering, so their prices follow the ore and parts markets more than direct demand.
Explosives and Devices (Consumable)
Auction-house prices and price history for Explosives and Devices in MoP Classic.
93 items in Consumables › Explosives and Devices are currently auctionable in Mists of Pandaria Classic.
Prices refresh daily from TradeSkillMaster (TSM), so day-to-day gaps in lower-volume listings are expected rather than a collection problem.
Explosives and Devices listings link to price-history pages with per-realm buyout, average, and median data for Mists of Pandaria Classic.