Is it the original barrel? If so, then I believe it would be Restricted. If it's been rebarreled to 18.5" then it would be Non-restricted.
The price? I have no idea, but I get the feeling that would be a really good price, if it's fully legal, registered and in good safe condition. Saw some at the show the other day, and they wanted much more than that...but those might have been special serial numbers, matching, perfect or near perfect condition, desirable manufacturers...