I received an offer to buy my house from a non-profit company. The company works with local city to build affordable housing. What kinds of deals / things that I need to look for in an offer? Relocation fee? Above market price? How do I approach in negotiating a fair price?

@Kevin Ngo I sold a property a few years back to a non-profit company that had a program to help first time / low income buyers. I don't recall that the process was really any different - there was a normal contract and appraisal - I may have been asked (required?) to give a seller concession - but it was still a profitable venture. I don't know why you would try to sell for higher than market value based on the entity purchasing it... ? 

Would this transaction be the same as a regular deal?