Hi twochai,
You may be pleased to know DHC6-110 cn009 is still alive and kicking as DQ-FEZ flying in the Fiji Islands for Pacific Sun. I have had the pleasure of flying her myself a few years ago before migrating to bigger beasts. I believe she is currently the oldest DHC6 in the world still in active service. I have heard she will be retired soon though.
The Twotter will always have the top spot in my heart way above anything else I have flown to date and will probably every fly. I would give anything to take one up for one more flight
Cheers,
Coco