Be as patient as you can. I find it really easy to look at a chipper that is in your price range, and then make yourself believe that it will work for your business. You try and convince yourself that, "Oh, we just won't chip too much big wood, we will have a log truck pick it up, or cut it into firewood" If that truly is how you plan to run your business, then go for it.
I bought this chipper when I started my business this summer. I was renting a chipper at 300 dollars a day. Then I saw this advertised for 4500.00 I ran to RI and looked at it. I bought it right away. It was a 9" with a pretty solid engine. I was not patient at all. This thing was a turd and chipped like crap. Says its rated for 9", could hardly do 6" and rattled like crazy. Bolts were falling off this thing daily.
I made it last as long as I could. I still rented a chipper for the large jobs. I ended up getting a bit of a back log and just happened to see this chipper listed at a local truck dealer. They deal in heavy equipment.
Now, not a monster of a machine. But, it was a huge leap forward from what aI was used to. Bandit 200xp. The hour meter is broken so I'm not sure how many hours are on it. They were asking 8800.00 for this. I talked them down quite a bit lower.
There are good chippers out there, you just have to be patient and grab a good one when it comes up. Remember, "Good Luck is when preparation meets opportunity"