I hunted high and low for second hand sheep hurdles last year,......like gold dust !!! the best I did was £12.00 each on ebay, I think you need to buy 25 or 30 to get that price. they are lighter in weight than others sold at £20.00 each, you get what you pay for, but they have been fine for me. you will find them on Ebay, its a scaffolding company who make and sell them.
andy