more than likley you have a cannon marketed under the CVA brand name between the 70's and last year. The last few years were sold under the "Traditions" brand name. I believe they have finally stopped selling cannons. The collectors value seems to be high on them, they are worth at least as much now as when they were sold new in kit form... maybe more. A picture would help, but it may be worth in the 150-200 range, maybe a little more. I am assuming it is a field cannon style?
They show up on ebay now and then, so if you want to get an accurate idea as to what t is worth, keep your eyes on that.