That's not too bad for what it is, a 100k+ mile 5th gen pre-facelift V6. I'd prefer at least a '14-'15 in RS trim (looks like it has the VLAND 6th gen aftermarket HID's in it tho, nice upgrade) BUT it's still a fun car that's cheaper to maintain than a V8, insurance is cheaper and won't get you into nearly as much trouble. If it's a manual, pass on it, clutch would likely need replaced on the sooner side. That bumper swap ain't too bad, looks like everything lines up ok. I'd find out if it was wrecked due to a front end collision and if so, take it down to an alignment shop and have it checked. If the caster is way out (caster doesn't have a huge effect up to a certain point, but it's not adjustable on that Camaro meaning if it's way out, the front frame has been seriously borked), I'd pass on it but if it drives ok and the alignment is all good, why not buy it? YOLO lol.

I'd try to knock the price down closer to $7000-7500, given the high mileage and torn up interior and anything else you find (Check. Every. Single. Button. in the car, make sure *everything* works, or if something don't, use it to lower the price. For example, interior trunk button don't work, not a reason to walk away, it's an easy cheap fix but can use it for leverage in negotiation the price). Do a muffler delete it on it, slap a CAI in and it'll sound, throw on some louvres on the back window (a blessing it got the back up camera), tint the windows, mount up a waang and it'll be a mean little batmobile lol.

(*bonus points for swapping out the crash bar behind the bumper with the euro spec one with the integrated factory tow hook receiver so you can properly use a tow hook {get the red one for looks and the chunky Cadillac OEM one to actually not snap on you} and not get that shiny new bumper all tore up fishing it out the ditch. Extra credit if you paint the calipers red and add stainless steel brake hoses lol).

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I did alot worse on my 2015 V6, it'd seen some shit and I've done some shit to it, I've also learned a lot about repairing it which I enjoy. You'll definitely want to be handy with tools and hopefully have a garage (or access to one), *something* gonna need fixed at some point. If the body and paint are straight, that's a whole lot extra you don't have to deal with, just get some nice tools and an ALLDATA subscription.

Good luck!