Where are you from (country)? Do you want to purchase a new razor or does a vintage razor appeal to you? Here are a few vendors not listed thus far:

Home - Our Online Shop
Straight Razor : Double Edge Razor : Shaving Products Supplies : Merkur Safety Razor : Badger Shaving Brush : Men's Grooming Products : VintageBladesllc.com
Shaving Shop - luxury classic wet shaving products - straight razors
Straight Razors - Safety Razors - Wet Shaving & Grooming Supplies

To orient yourself a little, if you haven't, check out the Beginners Guide.

Straight Razor Place Wiki:Books/Beginners Guide - Straight Razor Place Wiki

Good luck with putting together your kit.