need advise plz

lee1972
lee1972 Posts: 89
edited March 2013 in MTB buying advice
hi guys
bit different as need selling advise
i have 2 bikes happy with both but 1 has to go

have
2012 trek disc 3900 ( been offered £300 )
2011 haro flightline sport ( been offered £280 )

questions
whats the best bike what should i keep?
what will hold the price more in the future?

as havent got a clue which one im best keeping hold off

haro2_zpsf30f8f77.jpg
biketrek3900_zps97242b22.jpg