The Soundcraft Ghost mentioned above is a great console offereing a decent combination of price, sound quality, and features. You should be able to find a 24 channel Soundcraft Ghost LE with no meter bridge for around $2000 used. That gives you 24 mono channels and 24 tape returns (inline format). That is a very convenient layout for pairing with an HD24. If you do buy used though, be aware of a few things. The Ghost in specific does not seem to be quite as durable as other Soundcraft consoles. In a typical studio environment, this is not a huge deal. However, if it has been moved around, used in clubs etc... It may have some issues. Luckily, most of the issues are not major repairs, and with a little knowledge can be done yourself. First, the Ghosts seem to be more prone to taking preamp damage due to smoke and dust. Good news is that with an hour of dissasembly and 25 dollars of Caig, all but extreme recurrences of this can be fixed. Ghosts also use Soundcraft switches which are notorious for getting noisy. Sometimes they can be cleaned, but usually not. Luckily they aren't too expensive, but can be a real pain to solder on to the PCB since the Ghost was designed in a very tight little package.
As for Sound Quality, the Ghost is pretty decent. The older SOundcraft stuff sounds much nicer in my opinion, but the Ghost has a quieter noise floor. If you don't need all of the features, there are some other consoles that definately sound better in similar price ranges. You can have a used TAC scorpion, which is a very different sound which I prefer, but I can certainly see how many others would not. There is also the Allen Heath GS3. Same features, better EQ (IMO). Then there is the older system 8 like mentioned above. Very vintage sounding. Does not have quite the HF extension that a lot of consoles nowadays have, but beautiful warm EQ and preamp sound. You may even be able to find an Allen Heath Sabre in your price range. However, I still think the Midas Venice is king in the under 10 or 15k price range. Awesome preamps and EQ's, but it is setup for live use and you will lose some routing features. Not really the board for everyone unless they are ready to live with it's logistical restrictions.
I amy also have a vintage
Seck 1882 up for sale. It's an 18 channel board with tape returns. Sounds pretty decent, and has just finished getting fully restored.