I meant that as in: If you had a stack of the beautiful things on a table in front of you today, then you would have one hell of an expensive collection. How much it costed to make a MP44 or how much it was worth at the time i dont know. However, looking at the current prices of old war weapons, the sum of the MP44's under and on the table in front of him range around 500k-1000k. They are worth a lot these days and you can buy a good car for the price of an MP44. It'll still be worth it IMO
http://www.ww2f.com/topic/20451-cost-of-ww2-weapons/
Forum discussion of the cost of production for items made during WW2. Price for production wasnt always constant, varies per source, and may or may not be government controlled (and i say that in which a ton of resources were used to produce certain items for much cheaper compared to other weapons - since heavy production started to center around that item).
Actually the StG44 is not a MP but the first assault rifle used in combat and heavily affected the invention of the AK-47 Kalashnikov. As you probably know, assault rifles combine the firepower of a submachine gun with the accuracy and range of a rifle.
Great link by the way. If there only was the source of the information.