*copied from a post I did earlier in the IA forum*
As far as I can tell, no materials are Bind on Pickup, so you will be able to buy what you need. The only real question is what the prices will be for some of it.
The user CompassRose posted a very good Spreadsheet listing all crew skills and what materials they need. He also listed what crew skill is required for each material AND a list of how much of each you will need of it to max a crafting skill.
Based on that list, there are 39 materials that Cybertech uses. You get 12 of them from Underworld Trading, 23 from Scavenging and 4 were listed as possible Raid (Operations) loot.
And as I am checking that list right now, it looks like you do not NEED Underworld Trading to max your skills. You can max it out by just using materials from Scavenging. Sure, you will not be able to craft all the stuff and upgrades on the way there, but for the special things that you desire, you can just buy it.
So I would say go Slicing, get some money and buy the UT materials you need. Once I get into the game I think I will go the same path, Cyber, Scavenging and Slicing and see how all that works.
Check out the Spreadsheet yourself:
http://www.swtor.com/community/showthread.php?t=5432