Best of luck.
Are you absolutely sure you want to do that? Lets say you decide to get the appraisal and inspection($800-$1000) done, but the buyer gets a different financing! For sure an appraisal is great so you can price your home right. And an inspection to see if there are any defects with the house. But remember once you are aware of these defects, you need to disclose them to all the buyers that will come to see your home,assuming you are marketing your home, or just put more money in it so you could get the repairs done.
Now all the buyers is thinking is about that appraisal you got to FHA ( loans guaranteed and secured by the government ) approved your home. In conclusion, you have spend more money beside the $1000, but your home hasn't sold . Get a home selling specialist, it will save you money,time, and aggravation.