Looks like there are some archived screen shots from 2004-2008. You can check out “web.archive.org” and dig around a little better. Hope this helps!
https://web.archive.org/web/20070116120041/http://goldbuggy.com/

Try looking up the patent

I know this is an old post, but just wondered if you got your answer. We bought our Gold Buggy back in 2004 or 05 and absolutely loved it. They were fairly new back then. My husband made an auto-feeder that you just sit the 5 gal bucket up on his stand and water cleans out the dirt and it runs through the sluice. We made ourselves a scoop to get the sediment out of the bin before it got washed down into the water tank which helped a lot. Unfortunately my husbands health has put a stop to all of our rockhounding and gold prospecting some years ago and the Buggy has just been sitting there waiting to be used. Now we have to move and really need to sell it, for a really great low price just so someone can take it and use it. We "should" still have all paperwork that came with the buggy - if you happen to see this comment before we sell it or have it already packed for our move (we don't want to move it just to sell it later). What part(s) are you looking at??