I bought an Inazone 230 a few years ago and I have no regrets. It's a very comfy boat once padded out and it performs really well enabling you to improve your paddling 10-fold (well ... it did for me IMHO). I had mine until I got my level 4 proficiency and I know others did too (Suzzie, Donogh? and many others). Due to cashflow I wasn't able to keep it and have another one at the same time so I sold it. Others still had theirs for quite some time and bought another one which is testament to their financial situation and their confidence in the boat. The reason for my sale was for my personal paddling requirements, therefore needing a different kind of boat. It had nothing to do with the Inazone. If your standard is high enough you will be able to run almost any kind of river in it so you can't really go wrong with it.
When you do inspect it ensure that you do a thorough examination: general condition of hull and edges (cracks, scrapes, bumps, quality/thickness of plastic under the seat, is it banana-shaped from being pinned?), thigh grips, thigh grip screws (make sure they're all there and functioning well), seat, seat bolts (any cracking in seat or hull emanating from bolts? Again make sure they are there and functioning well. The seat (from memory) is fixed to the boat at four locations (two on either side) so make sure you examine all and that all the bolts/screws are there and functioning well. There's no point just seeing that they are there coz you would have wasted your cash when you come to moving the seat or thigh grips and you can't coz the screws/bolts have seized up. An easy but tedious way to check this is to actually take the seat out of the boat but that's a call you will have to make yourself. By doing so you will be able to examine the seat, the screws/bolts and the screw/bolt holes on the outside and inside of the boat. This list is not exhaustive to please add other areas to inspect if I missed any out. Oh, and never forget to try and get the price down if you can but 400 yoyo seems a good price.
Get your hands on a club Inazone and try it out on the water. After all this you may not even like it. If the club doesn't have one I'm sure if you asked around someone will be more than happy to loan you one in exchange for sexual favours :wink: Your deck may not fit the keyhole so take into account the purchase of a new one if need be.
I hope this helps and sorry for going on a bit too long.
André