Please don't trade. Yours appears untouched (unmodified), and he has ruined the value of his by putting that tapco crap on. If you want an underfolder that's legit, I'm sure you can find someone to trade with. Tell your friend he is an idiot
Worth a bit less that yours. The scope is worth close to $200.
Generally underfolders are not friendly to underfolder stocks and are almost never scoped except a few Polish models.. I'm not sure that underfolder stock will fold and lock closed even with the scope removed as the rail might be in the way.