I was attracted to your subject: your house value dropped too fast. Indeed you will need a miracle for this. Although I am not an expert in "Enchanted"-Energy, but a friend of mine once told me about an "Enchanted"-Miracle.
Take a handfull earth in front of your house (earth that connects with your house). Put this earth into a red shining paper and tide it with a red ribbon. Bring this earth to a River and throw it into the water.
Fingers cross, ofcourse, maybe the Earth-God hear your call, and bring to you soon the good news.
Sound very interesting may be worth a try but IMO you shall clear all clutters in your house and open your window to allow more yang qi to come into the house. Do not make the house looks too yin which might scare away the buyer. A new coat of paint may also do the trick. Good luck
Are you asking how to raise the value of this condo or how to get rid of it?
If the neighborhood and the market are such that the value is now $175,000 then I doubt that feng shui can change that much.
If you haven't yet listed it, select a good date and hour using a variety of date selection methods.
Since you do not live there, pay better attention to the feng shui of your own residence so you can benefit your luck.
Good luck... it is not an easy time!
Don't despair. The situation may not be nearly as bad as you think.