The figure was given away at Games days the year Gorka Morka was released. It was given as a prize for trying a racing game and winning or in my case making an attempt to hit every other model on the board. Mine sits on a shelf on my desk today.
Ive seen unpainted ones sell for up to a couple hundred and a high end painted one by Alison Mcvey (Fluffy on CMON) sell for around $350.00
Like anything in this hobby, its worth what someone will pay you for it. A couple years ago when things werent so bad economically it may of sold for more than you can get today.
The one on eBay looks fishy to me..looks very shiny, like its almost polished. Details also look soft. I think the seller will be very lucky if he sells it for that price.