Toyota Carina E Saloon - is there a market?

Good reliable cars and great to drive.

As for a selling market.. No.
the replaced model (Avensis) is more of a car bought and sold as these are too old. Parts are scarce

Look on Gumtree/ebay. You'll see loads of low milers for sale under 1k.

Thats the most they are worth unfortunately..

For Reliablility and comfort.. One of the best Toyotas indeed. The 1.8 is strong and has punch.. don't be expecting somthing out of this world though. Lol

I'd guess open market somewhere between £700-£1,200 depending upon overall condition and MOT. The current MOT expires in February 2018, I'd be surprised if the next MOT was megabucks but I'd want to give the bodywork a really good check over to see that there's no expensive corrosion issues underneath.
If you check the MOT history it's been doing only 1K-2K miles a year for the past umpteen years which suggests an elderly owner who's just died or given up driving for whatever reason.
There was a good reason these were used as taxis; 40+mpg's, they were very reliable and mechanically robust. They've also got a nice big boot.
Obviously with a 20 year old car you wouldn't expect the same level of reliability but they'd certainly be much better than, for example, a Ford or Vauxhall of the same era.
Achilles heel, they weren't particularly corrosion prone but after a couple of decades the potential for expensive welding work will most likely finish it off before engine or transmission failure. If the car has been garaged and rarely taken out in the wet or salt it might still be very sound.
I've owned a couple of earlier Carina models, they were extremely comfortable to drive and well specced. Excellent in the estate version!