Yes,
We had one about 7 years, Black C30 T5 geartronic box, top of the range job, pre R design pack. I never liked the R pack preferred the subdued wolf in sheeps clothing look.
Obviously quick,slightly heavy on the petrol 25mpg, well it would be. Solid safe car, handled well.
Geartronic very good, but didn't use it much, tended to leave it in auto, but check where the box comes from. I also had an older Volvo V70 D5 which had a General Motors gearbox which played up and they are expensive to replace. The one in our C30 was fine.
We only traded it in as the wife was making 400mile round trips at the weekend on top of our usual mileage, otherwise we would have kept it.
Doubt if you'll get a full service history one for £5K, but If you can get one within your budget, buy it.