Most junk-flagged items trade near vendor price, but a handful of gray transmog pieces carry genuine collector premiums.
Junk (Miscellaneous)
Auction-house prices and price history for Junk in Season of Discovery.
385 items in Miscellaneous › Junk are currently auctionable in Season of Discovery.
Prices refresh about twice a day from TradeSkillMaster (TSM), so a brand-new listing can take half a day to appear.
Junk listings link to price-history pages with per-realm buyout, average, and median data for Season of Discovery.