What is the value of selbstlade-pistole cal 7.65 with a serial?

Well, there is a problem with your question. You see, selbstlade is not a brand name. It is German for "Self Loading". In other Words, an automatic pistol. And there were several guns that COULD be yours. If you can repost with ALL of the markings on the gun, and it's condition, we may be able to give you a rough idea- but without knowing make and model, we can't.