Good luck as those jokers have skyrocketed. I bought one new in 99 or 2000 for $325. It was a tilt bed with mesh floor. That same thing now new is over $500. Check on craigslist.com.
I have a 5x8 tilt bed that was bought new at Truck-n-Trailer USA 2 years ago for $550.00 i think it was. Still in great shape pulled very little but I need a bigger one. I would let it go for $400.00. I am just outside Chattanooga.