What's the bikes in the rest of the collection?

Not knowing that, I'd personally have the Sultan as the go-to bike given the trails in Hong Kong (burly enough to do the DH runs, yet you can earn your turn to ride your way up to them). And whilst parting a bike out usually gets more $$$ than selling it as a complete bike, however now you're in HK, longer travel 29er's and the fact it's a large are a bit too niche, might leave you with the frame and perhaps fork unsold. The finishing kit/drivetrain should disappear like a snap though.