I wouldn't give more than $5 for all shown. Someone else might, but only for that one Vitro. Stick with it for a bit, it will begin to click in time. Marbles ain't easy, not for the faint of heart. But it is rewarding when you start to get it and it begins to fall in place. There's no shortcut for study and familiarization (time). Go to a marble show and talk to other collectors and ask questions. People here are willing to help, ask questions that will give you answers that propel you forward. Check out the archived posts on the marble sites and get all the info you can. Eventually it will start clicking a bit at a time.