Help me out. supergoose

According to this website your Mongoose was manufactured in October of 1982. It may or may not be a Supergoose though. If you scroll about 3/4 of the way down the page you'll see 'Serial numbers from 1981'. Under that heading it explains that the full cro-mo Supergoose had 3 holes in the brake bridge (2 slotted/ 1 round). If your frame doesn't have these 3 holes, then it's not a Supergoose. Also, it's hard to tell, but from your picture it appears that your fork may not be the stock one. The Mongooses of that era had the dropouts directly below the fork leg.

Thanks a lot for the info. Would you have any idea what a ballpark price would be?

I'm glad that I could help. Were you able to determine which frame you have?

Sorry, but I'm not able to put a value on your bike. You might want to ask the guys over here though. They should be able to give you an idea what your bike is worth.

The bike only has one hole in the brake bridge. :/ would this decrease the value any?

According to the brake bridge info on the Vintage Mongoose website your frame is not a Supergoose then. That being the case, I would guess that yours is a Motomag. The Motomag had what is referred to as a tri-moly frame. This means that the frame's front triangle tubing is chromoly while the rear triangle tubing is mild steel. This will most likely decrease the value but it's still a vintage frame and it will be worth something to a collector. As I said before, ask the guys over at BMX Museum and check out ebay to see what Motomags are currently going for. I hope this helps. Good luck and let us know what you find out.

Looks like you just have the frame, cranks and chainwheel. Maybe seatclamp. All the other stuff looks very average.
Good news. Os goose prices are on the rise. Maybe wait until early 2016 if want to sell. Holidays coming.