Showing an REO to an Investor

I am just now starting to invest in REOs,

If i find a property through a bank for 60k and i know its ARV is 115k from comps that i researched how do i sell it to an investor for a higher price if the investor can look up the property's current price. If i want to sell it for 70k and he looks it up and it says 60k how can i sell that without him going behind my back to the bank like i did???

thats always been my fear since im using transactional funding.