On autotrader for sale theres a 19TGD, grey with 32000 miles on it, no pictures though and described as mint Wants £1500 for it though. Good luck. Its still a 15 year old Bx!
Theres a 17 D (not sure if its a Turbo), in my local shop window with 40,000 miles, always garaged etc, full service history, 12 months MOT and thats up for £600. Would be a good price if it is a TD and is as lovely as 40,000 miles would sugest.