The one on eBay is likely not selling for that reason :-) the asking price is there since years if I recall correctly
You can search this forum as well to check what they normally sell for :-) its far from your asking price.
What VIN is listed in the manual you're selling? There is forum
http://912bbs.org where we also try to match the car with correct manual so might be worth while to include yours in this post if its having a VIN number