Property Appraisal after Hurricane Harvey

[Erica Williams]

Hello,

I am considering purchasing a condominium in Houston, Texas-Harris County. On the company's website it stated the property was not affected by Hurricane Harvey. However, the property faces Braes Bayou. 
Also, I logged unto the Harris County Tax Assessors Office the property appraised for $24,500.00 with no liens. They are selling the condo for $52, 900.00 owner finance with $3,500.00 down. Is this a good deal, steal, or neither?
Do they have the right to sell the property at that amount?