Honestly in this economy, whatever somebody is willing to pay.
As soon as anything becomes "collectible" (ie no longer made) there really isn't a going rate. I might have a Ty Cobb baseball card that "should" be worth $5,000 but I have to find somebody willing to pay that price in order to get it. I have some nunchaku that I wouldn't sell for any price. If you honestly offered me $5,000 I'd say no thanks. But that doesn't mean I'd ever really get a buyer making that offer. Conversely, just because I picked up a super rare pair of rosewood Doan's for only $10 last week doesn't mean that is all they are worth, that only means I found a good deal. It sorta works both ways.
Woodalls can serve as a "sorta" benchmark for many people. They can buy what "some" consider "just as good" and others consider "better" brand new while vintage Dolan's are typically at least slightly used. You can read about how the swivels alone can sell for $200 and perhaps there was a time before the economy took a crap that somebody was willing to pay that much for some genuine Dolan's hardware but that is probably not the case today.
Most would be much more willing to grab a pair of woodalls and be content for more than half that much and have a complete nunchaku. You also have to remember that people who are devoted to "collecting" things like this can be kinda rare and are sorta like trying to find people who still collect beer cans and are willing to give you $100 for one of your old cone tops.
Now certainly if you had for example a matched pair of 14" round or octagon cocobolo nunchaku with ball bearing swivel setups in mint condition there are a few guys here (me included) who would probably make a serious play for them.
As another benchmark there was a guy here about 2 years ago who had about a dozen still in the bag perfectly new Dolan's nunchaku and I was offered some Brazilian hardwood 12" octagon swivel chains for $45 and I took a pass. If they were 14" I might have bought them. But even at $45 he didn't have a lot of trouble finding buyers for some of his exotics.
Another alternative is to find a weapons auction site like Gunbroker (which obviously allows weapons) and see what you can get for them there. If you really want to find out what they are truly worth start at $1 and the serious folks will come out to play. Admittedly that can be a scary way to find out what your item is, and in many cases isn't worth. I've let some decent knives go for a song because I did a $1 start.
Anyway, hope that helps and remember to give me first crack at them.
