Bought a ninja from here. Good products but shady ...

Bought a ninja from here. Good products but shady salespeople. Salesman said he would give me 2000 for my bike. I started to draw up the paperwork on my new ninja and he came back saying it needed a new chain and sprocket and a couple other minor stuff. He then changed his offer to 1200 basically pulling the foot in the door technique. I bought the new ninja anyways and decided to sell mine on my own (I got 2300).