Yeah, it's a great deal! Grab it ASAP. A couple of things: if the tank is up and running, and you can transfer it fairly quickly, you won't have to cycle it. Unless you are planning on also schlepping the tank water to your place, go ahead and get the following items before you get the tank: Salt, 3 5 gallon buckets for mixing up your new salt water, a hydrometer (refractometer preferred, but a hydrometer will get you started), a couple of small heaters, and a couple of small powerheads. The heaters and powerheads are to condition any new salt water you make for the tank and the buckets are always needed if you have a fish tank!
Does the tank come with any livestock? If so, you will have to be careful when you move the tank, insuring temps don't drop (or rise) and that the move is dome as quickly as is reasonably as possible. If there is any LR (live rock) keep it submerged in salt water and treat it as a living thing, which it is, during the move.
Also, please keep in mind that "the sickness", as some call SW fish/reef keeping, can be expensive, not only from a maintenance standpoint, but also from expensive mistakes which we have all made at one point when climbing the learning curve. I think you have everything you need to get started and to learn the basics and I would suggest concentrating on getting your tank up and running, figuring out water changes, and making sure your tank is stable and all your parameters are good (Get a good master test kit!) before you add any new livestock or equipment. Oh, and get an RO/DI water filter as soon as you can. Expensive, but absolutely worth it!
Also, read the 101 Tips sticky-very good advice!
P.S. Welcome to the Boards!
