Samantha -
That's a good deal on an older Skutt. For the old, manual, KS kilns, there's just not that much that can be wrong with it. Kilns are simply very large toaster ovens. The only issues for manually switched kilns are: Corrosion, element age, and brick decay/breakage.
A visual inspection will tell you everything you need to know about the brick and the elements. If the elements are VERY greyed....bulging...sagging...gnarled looking, then you are rolling the dice on those. They're pretty easy to replace, and will run you about 350.00 for a new set...which will last at LEAST 100 firings...and likely a lot more.
Corrosion: This can only be seen if you open up the middle box. You want to see what the main terminal looks like where the power cord comes in. You also want to look at all the element leads and the connections back to each switch. Lastly...and especially if you're seeing rust on many of the internals, I would also pull one of the switches and look at its terminals. They can go bad and arc......ask me how I know!...lol. But! They're cheap (about 35.00) and wicked easy to replace.
At 450.00 that's a rock solid deal on a good looking kiln. I wouldn't worry too much about the chipped brick. As long as huge chunks aren't missing from the sidewalls...and the lid and floor are solid, go for it.
Lastly....if you're patient, you can look around and find a wall mounted controller. THAT is my favorite rig for electric kilns....why? You get the reliability of a cone...but the convenience of a controller!