Tried to buy a used truck from this place, put an ...

Tried to buy a used truck from this place, put an offer to a salesman, Ash, he accepted it while also noting that another person was currently looking at the truck. The offer was for a little less than asking and with some small cleaning requests. He took my deposit and said he would call me back. Calls back and says that he can't sell it to me for that price and that he could only accept full asking, going back on our original agreed price and also never disclosing the "unnecessary, fraudulent, and ludicrous" documentation fee of $595...Sales manager Mark gets involved, and they cancel the deposit and the agreed to price. Very suspect situation because at the exact time another person was looking at it. Not the way to do business and I will tell everyone I know of my experience (my company has 3700 employees).