I just looked them up and it's actually free at over $149 (plus $6.99 box fee so not actually free) if your referring to saltwaterfish.com:
They also have literally the worst selection of coral I've ever seen. Currently they only have 3 sps, period. Oh and they happen to be
1. Brown Acropora
2. Brown Acropora
3. Brown Montipora
Haha. No offense but not even in the same universe as vividaquariums.com. Vivid is high end wysiwyg and stock sps, lps, zoas, softies, inverts and fish. They have an incredibly solid reputation within the community and deliver high end livestock at fair prices with fantastic customer service. They also take great care of their livestock and have the longest livestock moneyback gaurantee in the market for a reason.
For shipping comparison purposes, other high end coral vendors usually either a) don't have free shipping at any cart total, b) have it at $250-$325, c) offer two day shipping which is far from ideal for most livestock, d) have terrible selection and quality, or e) some combination of the above.
I have yet to find a vendor that is better overall, and trust me I've looked. Sure some have more coral but they are usually way over priced. I've ordered from other places but for one reason or another (or several) I still think they are the best.