Assuming it is complete and can be verified as an SS by the drivetrain components the price on an average 68 SS ragtop would bring upper 20's to low 30's U.S. depending on the desireability of the correct colors and options. The description you gave is rather limited and "condition" is a major factor in the value.
For a good estimation: Go to ebay & check out the "completed" sales option of cars that are as similar as possible as yours. I don't know if you're talking about selling the camaro in Europe or the U.S. though. I don't know if the car would sell for more or less in Sweden than in the states. You could also go over & see what the asking prices are on similar cars on places like "collector car trader online" or "Deals on Wheels".
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