OK, I posted one about the price earlier then felt guilty, so deleted it.
In all honesty you can find them all over the place for 3-5 hundred but they need work. I purchased a clean one from Rocky Roads for $1k. I thought I over paid but it fits the bill. If its in perfect condition, and the guys on here are very critical, so that would mean show quality ready to bolt on and go. I would say around $1500-1800 California prices.
I think you can get a brand new one fabricated for less than $4k. Even less if you weld it yourself. Whom ever quoted $5k is out of his mind. You can pick up a running bronco for that coin.