You would make more money if you sold your items individually. - but that would probably take you years.
personally I would do the following...
sell off rare parts with common parts in bulk lots.. maybe all the black soft axles together..
sell older sets as complete units.. take the time to photograph and describe these well to increase your chances of a sale
then bulk lot the rest, bulk lot instruction books as well
put reserves on the rarer stuff but be realistic or they wont sell at all.
good luck and save at least one set :)