Thank you for the input at least now I have an idea how much I can post it on ebay. I guess it needs to find the right buyer willing to pay. Original owner told me he paid Cnd$1600 back in 1990 for this bad boy.
I'd say somewhere in the £150-280 range depending on condition. Would need to be in real nice shape to get the top end of the estimate. If you're putting it on eBay then make sure you offer postage. It might be a bit of hassle but you've so much more chance of getting a decent price