I'm sorry for not mentioning a "minor" detail: I live in Romania
Thus, a framebuilder is very, very hard to find, as are knowledgeable people.
As far as price, I never intended to restore and sell it. Rather just build it into a nice, period-correct bike to ride around town in.
Thanks for the details!

P.S. - I checked ebay.de and IDK what "very little money" means in Finland, but here 7-800 euros is a bit more than a month's pay for most people.