I think that set is worth about $40-50. The $999.90 looks like a decimal typo. With Hasbro now owning the Sunbow properties I wonder if we will see another boxed set soon?
The have re-owned the rights for 5 years now and still no movement. We can all hope though!
The auctions tell there own story - clearly the current price is 80-100 but the set turns up with "reasonable" regularity on some retailer sites so I would hold out rather than dropping that kind of money
And as mentioned before this surge in price is a recent thing, they were not that kind of price even a year ago! So cool that more and more people want to experience the original!