Depends on your market. In the US, an authentic, pre-89 HK91 (an authentic Heckler & Koch rifle, not talking about the "frankenguns" from Century Arms or PTR)... the last one of those I saw went for $3,000, and that was almost ten years ago. Looking on Gun Broker, the people who are selling the authentic models seem to set their prices between $5000 - $7000.
Heckler & Koch, G.M.b.H
Yes
Heckler & Koch G3 Steyr AUG M-16 AK-47 Heckler & Koch MP5 Heckler & Koch MP5K-PDW Heckler & Koch G3 Steyr AUG M-16 AK-47 Heckler & Koch MP5 Heckler & Koch MP5K-PDW
2 tuned Heckler&Koch USP
Royal Ordnance, BAE Systems, and now Heckler & Koch.
ERMA MP40 (aka Schmeisser, standard-issue German smg of WWII) Heckler & Koch MP5 Heckler & Koch MP5K Heckler & Koch MP7
100-2000 USD depending on specifics
The Guns that the Portuguese army use are as follow's. Handguns Walther P38 SIG P228 Heckler and Koch USP9 Rifles and Carbines Heckler & Koch G3 Heckler & Koch G36 Heckler & Koch HK 417 IMI Galil Heckler & Koch MSG-90 AI AWSF AI AWSM AI AW50 Barrett M95 Barrett M82A1 Sub-Machineguns Brügger & Thomet MP9 Heckler & Koch MP5K Heckler & Koch MP5A5 Heckler & Koch MP5SD6 IMI Uzi Shotguns Mossberg 500 Benelli M3 Franchi SPAS 15 Machine Guns MG3 Heckler & Koch HK 21 FN Minimi Heckler & Koch MG4 Heavy Machine Guns FN M3M Browning M2HB Grenade Launchers HK79 M203 Heckler & Koch AG36 ARWEN 37 Milkor MGL Mortars 120mm Tampella B 81mm L16 A2 m/86 60mm Soltan 60mm FBP m/68 Missile Launcher's M72 LAW Carl Gustav M3 MILAN TOW
Th XM8 rifle was developed by the US Army from the late 1990s to the early 2000s. It is a lightweight assault rifle. The US Army collaborated with Heckler & Koch to design the XM8 rifle.
Heckler & Koch P2000 HandgunRemington 870 ShotgunColt Arms M4 Carbine Rifle
.45 auto, if, by "G36", you're referring to the Glock 36. 5.56x45 if you're referring to the Heckler & Koch G36 rifle.
600