Why do you think next contracts be more expensive? Genesis Mining has the same price for a very long time and the presale for the new hashrate was also the same rate.
The cost of electricity and maintenance however is lower for new contracts; so it's better to have new hashrate then old hashrate.
Price of Genesis Mining is too high - it takes too long to reach ROI (that's probably why you are selling) if you reach ROI at all. When bitcoin price drops the contracts will be terminated soon enough.
Then black friday is coming soon, with big discounts also on hashrate.
So that's why I think your asking price is simply too high.