I’m having a hard time here

I bought a house last year out in a rural area about 30 minutes from work. It was a foreclosure, but it was in pretty good condition. I had to fix some of the plumbing and repair a few kitchen tiles but overall I got a great deal on the place and was very excited to live there. One thing that the house didn’t have was a central heating and air conditioning system. I didn’t think much of it because most of the year, the weather is fairly temperate and I don’t even need to use the air conditioner or heater. In the summer time, I decided it would be best to just use a simple window air conditioning unit. In the winter, I just use a small electric space heater. However, I just found out that my company wants to transfer me out of the country for at least two years so now I have to sell my house. It’s such a pain to sell this house. I have had a lot of interest in the house so far, but as soon as people find out that it doesn’t have a central heating and air conditioning unit already installed they change their minds. Even if I offer to drop the price a few thousand dollars, they still don’t want to buy the house without an air conditioning unit. I don’t understand why it’s such a big deal. They can easily have a new HVAC system of their choosing installed after they move in. I don’t want to buy an HVAC unit for this house in order to sell it. I would definitely lose more money. Hopefully, someone will make an offer soon. I have to move in three months.