A Few Questions About Some Of The Rare Canadian Coins I Have

Hi, this is my first post...forgive me, but I skipped right by the Introductions because I was lucky enough to find this forum which I didn't know existed until now.

Back when I was a kid, I was heavily into trading my coins with friends. One day my cousin and I were comparing coins and he offered me what appeared to be a counterfeit Canadian dime (circa 1985). It was much smaller than a normal dime but still has the Bluenose on the reverse and the Queen on the obverse. It's been encased in a plastic coin holder for more than 25 years and it's rated in poor condition. Tell me, am I legally at risk, for possession of counterfeit money? Seems like kind of a stupid question but it's all harmless trading and I don't know where he got it from.

Also, when I worked in retail many years ago, I broke open a roll of quarters, and in this role there were 4 blank 25 cent planchets, in circulated condition. What are they worth? Again, when I found them, I took them home and put them in plastic coin holders and put them away.

I collect rare error coins - I have clipped pennies, bent dimes, EF frosted nickels, and lots of double-punched coins but alas, none of these have ever brought me any fortune other than sentimental value.

Thanks for any info.

Dan