I'm considering purchasing this .3o Caliber Luger that has the number "4" stamped on the frame, trigger and inside the takedown side plate (Thats as far as I inspected it). GERMANY is stamped on top of the breech.No other proofs or stamps anywhere, its in excellent condition with a mint bore. I'm looking for a good shooter with unique collectors appeal, a friend of mine who is knowledgable on Lugers says it's no deal at $1500. I think the odd number creates value, what do you guys think? I'll try to post a photo--GW