IMHO a grand is very fair.
I'll give him the benefit of the doubt here and say that he thought they were $170 ea, and you would have better luck selling them cheaper. I've never seen anything in that size that cheap, but who knows. I've been wrong before.
Free bump just means he's posting, bumping your thread back to the top. Makes it more visible. Lots of the time guys will post just that to bump someones ad back where more guys will see it, hopefully helping the item to sell.