I bought Finnish businessregister from Osoitetalo.fi, which had reasonable price per contact. Customerservice was fast and i got my businessregister (email one) in 1 day.
After 1 week of sending emails i can claim that bounce rate is around 0.7% from all emails i have sent till now (around 27 300). I think this is really good bounce rate for ready made businessregister.
I have already got many tenders.