No I don’t. I order wherever I can get what I need. Here in Germany everything has become ridiculous expensive since the “legalisation” so it’s good advice to look around and just check.
Usually I search for the item I need and google (or whatever) will show me a handful of shops.
UK can be a problem. Since they left the EU you have to pay tax and customs and what not.
Sometimes you can save a couple of € by looking at shops “more east” of you: For me as a western european lets say in Poland or Czech Republic etc.
And of course have a look if the manufacturers themselfs ditribute their products in Europe. this way you don’t have to pay the retailers as well