I would not replace the warm air system as I dont expect it would make the house significantly more desirable for the given cost. I also wouldnt have someone throw in a wet heating system really badly with pipes everywhere just so that you have some heating to tick a box.
I dont know the area, state of the rest of the house, target buyer, etc, but I would either sell the house without, draining down the water, using trickle vents to keep house aired, and a pair of 2kw fan heaters to take the chill off proir to a viewing. Or I would bite the bullet and spend the time and money to do a decent job on installing a all new wet central heating system, routing the pipes sensably, and using a mid-spec popular brand boiler.
Daniel
I dont know the area, state of the rest of the house, target buyer, etc, but I would either sell the house without, draining down the water, using trickle vents to keep house aired, and a pair of 2kw fan heaters to take the chill off proir to a viewing. Or I would bite the bullet and spend the time and money to do a decent job on installing a all new wet central heating system, routing the pipes sensably, and using a mid-spec popular brand boiler.
Daniel