That is a decent price, I am building a kegerator right now, and I purchased a Frigidaire 445GM from Lowe's, and my keg supplies from Kegconnection.com. My build is coming in at around 6bills total, with new mini fridge, 2 corny kegs, 5#co2 tank, dual body Taprite regulator, check valves, gas hose, beer line, perlick faucets, dual tower, faucet wrench, connectors, etc... I don't know if your kegerator comes w/perlick faucets or not, but for $100 more I am getting the kegs, and a co2 tank with a dual body taprite regulator. So weigh your options.
I am almost certain that once my build is done the fridge I purchased will be smaller than the unit that the kegerator you are looking into is made.
Regardless, buying it saves you the time and the hassle of having to build it, and I'm sure it is more suited for larger kegs. The unit I am building will fit one 1/6 barrel, or two 5 gallon corny kegs, not a 1/2 or 1/4 barrel. If you plan on utilizing the larger keg sizes then it is a good choice. I don't know what you might be paying for shipping either so definitely take that into account.
Delivered to me it will come out to $627 and change, I'm only into mine at about $594, but I do need to purchase some odds and ends, so all said and done it will be close to the same as what I will end up paying for my build.
Having said that, I will have a slightly smaller unit (less diverse however, only using either one 1/6 barrel or two 5 gallon corny kegs), but I don't plan on buying 1/2 or 1/4 barrels, and even 1/6 barrels...I'm a home brewer! Plus,evey time I pull a pint I can relish in the fact that I made my kegerator, and I can brag to anyone who comes by.
All said, I'd say build it...contribute to the vendors here on HBT, as they are truly helping the home brewers here, and I support them in their efforts. Plus you found a good deal and I am kicking myself right now, but again, I am weighing the options...size, convenience, and bragging rights are all coming into play.
Take the time to think about exactly what you want in a kegerator, and how it will suit your needs, either way, good luck and enjoy!
Cheers!
BGB
P.S. That is a good price, dammit, sometimes I hate this place - I always seem to be a day late and a dollar short...I think I'll change my sig!