Welcome to the forum. Boker is a well known and well regarded maker so it would be hard to go wrong there for a brand new razor. You could also consider Ralf Aust, Revisor and Thiers Issard for brand new razor makers. You should buy from a vendor that is known to supply shave ready razors. The are quite a few EU members that I am sure will chime in as to who these vendors might be in the EU. If you can afford it, I think new is a good way to go for your first razor.

Straight razors are easy to maintain if you everything right from stropping to shaving and do not drop or ding the blade on something. Unfortunately stropping properly and having good shaving technique is generally not a strong point for a beginner, it wasn't for me. That being the case beginners generally have to send out straights for honing more frequently in the beginning than more experienced shavers do. Just saying that so you know going in what to reasonable expect.

I hope you make a purchase you are happy with. I am sure you will get many more suggestions too.

Bob