The site from your link shows the complete game sold for $1500, and going to the actual source ebay link shows the game as sold for $1999.00. I would have to trust that this site actually recorded the best offer amount properly, from that ebay link I can only see the original buy-it-now pricing of $1999.00 as they don't display the best offer prices. Ebay used to show the actual sold pricing for best offers but only if viewed through another country's site, it's since been changed so I can't do that anymore. So it might have sold for $1500 or maybe not, also assuming that the buyer actually followed through on the payment and didn't request a partial refund later or any funny business.
It's also difficult to know current pricing as pricing can change over several years and there's very few examples of recent pricing for this condition. I'll have to decide if I want to keep it for myself, possibly sell it, or possibly trade it for several rare games that I've actively been looking for. Four figures would certainly be nice.
I have found a few other things recently but haven't got around to taking pictures, I'm not sure if it's worth the effort for the other stuff. I'll see if I get around to posting it.