I think you got a pretty good deal. I've seen cues just like this go for close to a $1000, between $800 and $1000 depending on several factors like pin and condition and joint. I've seen cues with ring work like in this plain jane style go for right at $1000, maybe a smidge more. Add in an extra shaft and I've seen them go for $1200.
I own a couple handfuls of Scruggs and have had more than my fair share pass through my hands and I've usually paid/sold closer to $1000 for this style. Usually in the $850-$900 ballpark. Sold a SUPER NICE stained curly maple one with average rings at bottom and top and 2 standard shafts with the 5-16/14 steel joint pin for $1200. I've also bought and sold really nice TS Bacote sneakies for $700.
So bottom line, I think you got a deal and it bordered on stealing it. I would say good for you dude. Nice job. It'll play bang up. I hope you love it like I love all of my Scruggs (right now I just happen to love Black Boar more so mine don't get a lot of play!).
But in today's market....who really knows what people will pay.
R,
Greg