I agree most are fake. The design of the "oak leaf" cross guards is wrong, as is the pebbling of the leather. The "damascus" or damascus blades have the incorrect pattern. This is just for starters. There are other indications here and there I won't go into. I agree the army and luftwaffe daggers appear to be original. I wouldn't get too depressed about these. You can probably get $100, maybe several hundred, apiece for some of them from the right buyer. I wouldn't advertise them all at once, especially the ones that are alike or similar. Be sure to note they are reproductions, but are of good quality. Some collectors may be looking for "fillers" for their collections, some may just want a display piece or two. Find a good online auction (not eBay!) that sells militaria.