Players will still be able to get all of them via trades
Nine classic items from the Team Fortress 2 store will be taken out of the game forever once a two-week grace period expires and advises all those who would like to use or wear them to get them as fast as they can although they will still be available via trades.The complete list of items includes: Batter’s Helmet, Soldier’s Stash, Pyro’s Beanie, Demoman’s Fro, Football Helmet, Mining Light, Prussian Pickelhaube, Trophy Belt and Fancy Fedora.
The official announcement opens in typical Team Fortress 2 with the phrase: “Bidwell was taking stock of some of our older merchandise this week and found out some idiot's been using one of our warehouses to store pallets of spoiled mayonnaise. Raccoons all over the place.”
The entire official Valve update is worth reading for the general insanity of the prose and the exact information on how the items will be retired.