tbh I would just keep it and run it into the ground, not worth selling it for that price especialy when you have spent all that money and its running right, even keeping it for a winter vehicale or workhorse makes sense as it keeps the newer motor good. Wrong time of year for selling I'm afraid, on older 4 x 4's only landcruisers seem to hold thier value all year. Mine is a 97 2.5 DT and would not consider selling it even for your starting price as its worth a lot more to me, she just went through her MOT yesterday with no probs, not bad for a 14 year old motor so its all relative but there is always some who want something for nothing even though a cheaper one would probably cost them more in the long run.
Best of luck
Davie