Reasonable price is a relative term.Reasonable to the buyer might be 75k,resonable to the seller might be 150k,see the problem?
Is it listed with another agent,is it fsbo,is it not listed at all?If it's listed you are required to negotiate through the listing agent and not the owner.
Before wasting everyone's time does the seller want to sell,do they need to sell,are they motivated?
Say I have a client that might be interested in purchasing your property,is it for sale?
If they say yes,then qualify them some more,you broker can give you more pointers. good luck