I sat in on and testified at the hearings and it was very depressing.

@Dylan B.A colleague of mine owns a restoration company, and constantly testifies to the durability and appeal of high-end vinyl flooring.

All tenants were so afraid of her that none would testify against her at a eviction hearing.

Been around plenty of mortgage fraud over the last 15 years and have testified in many court cases and with the FBI. 

I had a ticket booked to fly in from out of town to testify that the tenant has not sent any checks and now they are changing the dates on us. 

(I had LOTS of documentation) They flew people in from Florida & California to testify but their testimony didn't match the documentation.

He just testified in front of congress in February regarding changing current environmental laws as a way to increase econimic development and job creation in cities like New Bedford.

All these plumbers are willing to testify on behalf of the buyer. 

I need someone who could testify as an expert to the diminution in value based on the seller's failure to disclose (i.e. what kind of discount would a potential buyer have been looking at had the defects been properly disclosed).

I suppose you can try to get the previous owner to testify on your behalf, but you should be prepared to subpoena them.