That looks like a good eBay find, mrbostn, and a good price for a SS kettle. Here are some things to keep in mind:
1) The larger the kettle, the less you will have to worry about boilovers. Most people doing full-volume boils are using 30-32 qt kettles, or 7.5 gal. Preboil volume on a 5 gallon batch is usually about 7.0 gallons, so that puts the wort very close to the top of the kettle. A 9 gallon kettle is a very wise choice because it gives you more head room to assist with keeping the wort from boiling over.
2) If you are using an immersion chiller, then a spigot is not mandatory, but is still helpful in my opinion. Because you will chill the wort first, you can use an Auto-Siphon once cool in order to transfer the wort from the fermenter to the kettle.
3) If you are using a counter-flow chiller, then a spigot is almost mandatory. Siphoning hot wort is a difficult task that leaves you very vulnerable to burns. Being able to drain through a spigot, out into your CFC, will help chilling immensely.
I'm doing both 5-gallon and 10-gallon batches, so I'm shopping for either a 60 qt or an 80 qt brew pot. I haven't made up my mind on SS vs Alum yet. If you have your heart set on 10 gallon batches sometime in your future, you'll want at least a 14 gallon brew pot. But if you're definitely content with 5 gallon batches (which many, many people are!) then I think the eBay kettle is a great deal, cheaper than you would probably find a 9-gallon kettle plus a weldless fitting for.