I Shouldn't Have Asked About Old Coins

Now here is what happens sometimes when you keep asking someone if they have any old coins. My neighbor is an auto machanic and frequents junk yards for parts and in the dirt and debre if he finds any coins he keeps them. Also, at work if tearing a car or truck apart and find any coins he keeps them. If he finds a coin on the street he keeps those also. All such found coins go into a large jar and have been for many, many years. He also has a freind that cleans up at the end of the day at a bar and also finds coins on the floor that he gives my neighbor and those too go into that jar.
So finally after years of hounding he handed me the jar and said go through it and let me have what's left that you don't keep.
At home I dumped what appeared to be possibly $30 or more in coins on a table.
THEN YUK. At first I pulled out all the dead bugs. Then all the dirt. Then all the coins stuck together. Then I pulled out all the coins I wasn't sure of what they were. Then pulled out the dented, bent, gouged, covered with something ones. All these went right back into the jar. This left about a few handfulls of coins. Then I tried to read the dates and noticed that would take a powerful magnifier and by now I'm getting a little tired.
Finally pulled out one rather clean Canadian Cent and am about to return the mess to my neighbor. I asked and thought there was a chance of something but not really expecting this mess. Now in the process of spraying the area with a disenfectant.