I have ordered from several vendors (Hotrox, Watford, Tubeampdoctor), but since about a year I stick with Doug's tubes from the US. The quality of his selected tubes is far superior, he has a huge variety of tubes and knows his stuff, he can pretty much give you a personalised recommendation for your amp and preferences. For me it's worth the additional days wait and customs.
I ordered tubes for 90$ recently, and it took 10 days until I had them, had to pay 10€ fee to customs.