I've owned a 2.3t Saab 95 Aero HOT estate for the past two or three years. Excellent cars, amazing value for money.
As you'd expect, it's an incredibly well engineered car. Ignore those that say 'oh, it's just a Vectra C with another badge'. That is nonsense.
Mine is a facelift 2001/2 model, manual gearbox. It had 60k miles on the clock when I bought it, full Saab service history, one owner from new, 12 months MOT and a couple of months road tax. I paid £1200. Since that time, we've used it as a proper workhorse, and we've chucked another 60k miles on it. The only things I've had to fork out for are a set of tyres, front discs and pads, a brake line and the usual service items. Oh, and a crank sensor last week.
Things you MUST check:
These cars have to be run on fully synthetic oil from new. Running semi will cause oil sludge to build up in the sump, clogging pickup pipe and starving the engine. Check the service records to see what oil has been used. If 10w-40 at any point (or anything that isn't fully synthetic), then you'll need to drop the sump, clean it out and refit. If you can find no evidence of oil used, then you'll need to do this anyway.
The crankshaft sensor tends to give up at around the 100k mile mark. £70 for a new part, half hour job. See if yours has been replaced. If not, factor it into your offer. Worth replacing anyway.
Fuel pump relays can give up at around this mileage.
The direct ignition cassette is much more advanced than the coilpacks of similar cars. Sadly, they can also give up for fun around 100k. It's an expensive part (£250ish iirc), but mine has been fine, touch wood. Plenty of other owners have had failures. Check to see if it's been replaced in the recent past.
SID (information display on the dash) pixels frequently give up the ghost. Again, mine appears to be the only one in existence with a full complement of digits, haha!
The turbos on these cars are pretty big (Mitsubishi units afaik) and can be quite laggy. That's actually good news if you don't want to be stopping at the filling station every five minutes, as you can keep your foot off of boost and only use the power when you 'need' to. Surprisingly, my normally aspirated Astra Coupe 2.2 was way more expensive to run than the 2.3t Saab.
These are great cars. The estate offers bags of room in the back. I don't know how we did without it tbh. Masses of comfort, luxury etc too. Typical Swedish over-engineering of everything, giving you German barge quality at Vectra prices. "The posh Vauxhall".
Manual transmission can be a bit 'notchy', but it's the one to go for.
Your quote of £2k for an example with 122k on the clock is well overpriced, but you might argue that you're paying for the fact that it's an '04 plate. A quick look on eBay threw up an estate with 80k on the clock for £1600. There's another for £1200 on there too. Facelifts, I mean (post 2001, pre-'Dame Edna' models).
I would buy another in a heartbeat if I had to replace mine.
Let me know if you have any specific questions that I can help with.