You don't need to be an 'investor' to invest in Singletrack: 6 days left: 95% of target - Find out more
Would you feel safe selling an old laptop or would you be paranoid about someone recovering data? It's had a full wipe with Dban so seems pretty safe, and probably a lot of effort to require some not particularly interesting personal info.
You can't get the data back after Dban so just let it go.
Do a tripple pass wipe with zeros and one's if concerned. Ccleaner has a built-in drive wiper but there are lots of similar apps.
Unless you keep a folder that says “all my online banking log-ins” is there much risk?
If it's been DBANed then the chances of getting data off it is nil for all practical purposes. I can't really see your average Joe spending a grand on forensic recovery to get your Facebook password.