bad news is its $379.95 http://www.armygasmasks.com/Unissued-Avon-S10-Gas-Mask-Respirator-p/aaagas-91.htm
you'd be a fool to pay that much for ex-milita. that looks nothing like pyros mask. that's just some poor SAS type mask you can buy for £10
The Russian ones are more similar to Pyro's and they're often 1/10 the price. http://www.ebay.com/itm/Russian-BLACK-GAS-MASK-GP-5-set-size-2-medium-/250887948217?pt=LH_DefaultDomain_0&hash=item3a6a1647b9 And the S10 masks (like you posted) are only half-head (straps), and shouldn't cost that much either. This one's only 30 pounds. http://www.ebay.com/itm/S10-Respirator-gas-mask-DPM-Camo-Bag-2-Filters-/300637232258?pt=UK_Collectables_Militaria_LE&hash=item45ff601c82 You'll need a Nomex hood with it if you want to use it to play Pyro. Can the mods move this to the Cosplay section?