Weak strike and exstra blob?

I have spotted a few weird coins.   My question is: Is it interesting findings? Is it worth something?

They are interesting if they interest you, they shouldn’t add extra value but some idiot will pay more than 10c for one if you really wanted to sell them. Of course if you wanted to sell them, it is of my opinion that you are not interested in them and interested only in the increased value, here you could make a few cents extra 😉

Hard to tell from the photos, but possibly minor “struck through grease” errors for #1 and #3. 

There is a market in the US for US coins with this type of error, but the values are not high, at most a dollar or two for minor errors. 

I don't think there is much interest from European collectors.