Do not buy ties online unless you get a good recommendation on them. I have no experience with the company personally but you want to make sure your ties knot properly and can achieve a decent dimple if you like that look. There's just no way to be sure of that with a random company. The forum affiliates mentioned by Claghorn are a good place to start and I would strongly second the Sam Hober recommendation. Yes, you will pay more, but you will get a beautiful, well-crafted tie handmade with high quality silk.
http://www.styleforum.net/t/245529/a-sam-and-david-hober-tie-appreciation-thread
If you're curious about the dislike of black suits around here, just do a search for black suit. Not going to hijack an unrelated thread for that tangent, but since it came up...
All black, grey and blue for your first five ties? I disagree. I think a black grenadine, navy grenadine (or midnight grenadine with pindots, just got a new Hober and it's wonderful) and some sort of silver / grey tie would make sense to be on this list, but five ties with only these types of colors? At least one burgundy and either a lighter blue, pink or lilac. Maybe even green. I think once you have one black, one navy and one grey tie, you branch out until you have a few decent colors. Maybe on tie number 8 or so, you get back into these three colors.