Case Hardened renders the M9 Bayonet as color case-hardened steel, the mottled blues, golds and greys produced by heat-treating the metal with wood charcoal at high temperature. No two blades share the same coloring, and copies with large concentrations of blue across the blade face are the prized ones.
M9 Bayonet (Case Hardened): design, wear and market
Case Hardened pattern & Blue Gem
Case Hardened skins are tinted by a paint seed, one of 1000 patterns. The seed fixes the blue, gold and purple layout on the weapon, so two Case Hardened of the same wear can look completely different and trade at very different prices.
Seeds with heavy blue coverage on the most visible side are called "Blue Gems". On the AK-47 the best-known examples are seeds like 661, 670 and 955; on the Karambit, seed 387 is the reference Blue Gem. Tier lists rank seeds by blue percentage, and top patterns command large premiums over an average Case Hardened.
Because the seed is not shown in the item name, buyers check the paint seed in the inspect screen or a pattern database before paying a Blue Gem price.
Across 25 markets the BS floor moved -11.6% in 185 days: $447.50 → $395.55.
Cheapest venue vs Steam right now: $208.84 apart (34%).
Sources: Valve item data · our 25-market price snapshot.
How much does M9 Bayonet (Case Hardened) cost?
M9 Bayonet (Case Hardened) is listed from $395.55 on 25 marketplaces, every price with buyer fees in. Wear floors: FN $970.00 · MW $508.07 · FT $417.07 · WW $403.32 · BS $395.55. Steam asks $609.11 for the same listing.
Where can I sell or cash out M9 Bayonet (Case Hardened)?
Top net quote at the moment: $378.28 via DMarket, seller fee already deducted — the Sell tab compares what each venue actually pays out.
Does M9 Bayonet (Case Hardened) come in StatTrak or Souvenir?
It does — StatTrak (from $448.02) listings exist too. Pick a Quality pill above to see that variant priced across the same markets.
How do I get M9 Bayonet (Case Hardened)?
Two routes: open CS:GO Weapon Case (trading from $95.58) and gamble on the odds, or pay $395.55 for the skin itself on the markets above. The direct buy is nearly always the cheaper path.
CS:GO Weapon Case
Inspect a BS copy in game 
