Anyone have an opinion on used 06 Orbea Onix w/ Campy Chorus?

Hello ladies!
I want to see if I can get some feedback- positive OR negative, about a bike I'm looking at purchasing on Craig's List. To give some background, I've been cycling (road) for about 4 years and have just recently been getting more serious about my riding. I'm also a runner and have competed in several duathlons, and if I can get over my fear of water, there may be some triathlons in my future...we shall see :) I've been riding a hand-me-down aluminum Trek 1100 as a gets-the-job-done bike, but it's definitely time for an upgrade from my down-tube shifters and clunky components in general. I'm also wanting a different bike because I have lower back pain due to riding a bike that was fit to another person that I've tried to adapt to, but you can only take these things so far before it's just time for a bike that fits! SO, I've been debating whether I want to stick with aluminum and just go with higher-level components, or splurge on the frame (carbon) and not worry so much about the componentry. The latter option is what I'm leaning towards right now. I happened to find a bike on Craig's List that I went and looked at today- it's a 2006 Orbea Onix, medium frame, full carbon with everything Campy Chorus except the crankset, which is an FSA compact double. I went into it fully expecting the bike to be too big for me, because I have been fitted in the past to an Orbea Onix Dama (women's version) in a size smaller. But the fit felt fine on the test ride, which is really all I have to go off of until I can get someone to really take a look at me on the bike and measure to see whether it's truly a good fit. There was some saddle discomfort, but I would think that a different saddle could possibly be the solution there. The seller is asking $1700 OBO. There's really nothing wrong with the bike except a couple of minor cosmetic issues with the finish. The bike didn't originally come with the Campagnolo Chorus components- the owner said he switched them out at some point.
To wrap up, I'm basically looking for advice in terms of what to look for, what could be a red flag, any suggestions or feedback as far as the components are concerned, etc. What do you all think of buying used as a first real bike purchase? Should I be concerned about not getting any sort of warranty or anything? Does anyone have feedback on the price- does it seem fair? Any help would be greatly appreciated- as I said, I'm fairly new to cycling and, although I know I need a bike upgrade, I feel pretty overwhelmed with the sheer quantity of options out there (new/used, frame, components, manufacturer....) and am just looking to see what other people have to say. Thanks very much!

Chorus is a very fine set of components.

The most important is fit. Is this frame the right size for you? Stems etc. can be exchanged but the frame has to be "it".

2nd hand is a good option. With carbon, ask if he ever crashed. There should be a warranty on the frame that you as the second owner should receive. My former Look frame had it.

Chorus is a definite plus!! I'm not aware if Orbea has a second owner warranty, many companies do not. I would definitely check into that. You could also ask if they would mind taking it to a shop to have it checked(providing you are serious)out, although perhaps this is something that you should pay for??

Good luck, sounds like a grea find!

Thanks for the replies. I'm glad to hear positive responses to the Campy Chorus setup- it sounds pretty good based on online reviews; I just hadn't had any first-hand experience with Campy components.
I actually met the owner at a bike shop yesterday when I looked at the bike- apparently he was thinking of posting the bike on ebay and was going to have the bike shop post it for him- but unfortunately, no one was available to take a look at my "fit" on the trainer while I was there. It sounds like the owner of the shop is the best person to take a look at me on the bike, but he's very busy and I would most likely need to schedule an actual ($$$$$) professional bike fit if I want to be guaranteed of anything. This isn't something I would want to do unless I decide to purchase the bike and want to make sure it's fine-tuned to fit me perfectly. At this point I'm just hoping for a ballpark fit so I can know whether to continue pursuing the bike or not. The bike felt pretty good when I was riding it, but it's hard for me to tell whether the fit is as it should be because I've been riding an ill-fitting bike for so long, I don't know any better! So I'm still working on that part of it- basically I'd just like a second opinion (besides my own, obviously) that the frame is a good size for me and NOT that it's just been adapted to fit me by lowering the saddle and using a short handlebar stem. :)

Oh, and also- just looked this up on the Orbea site: The warranty applies solely to the original purchaser for bicycles and framesets purchased new from, and assembled by, an Authorized Orbea Dealer and is not transferable.
So, sounds like the warranty is out. I'll definitely ask the owner about any crashes he's had on the bike, but I can only go by his word and hope it's the truth! :confused: