Ten to 15 years ago, I purchased a big 300 coin lot from various countries. When I bought it, it was loaded with silver. I pieced them out on ebay, and got tired of them. I dont know anything about foreign coins, so I am willing to learn as well. I just found them, and could use a few extra bucks during the holiday season. So, if you see anything special, let me know. Thanks a ton.
They pretty much look like run of the mill stuff that is found in lots. Nothing screams big $, sorry.
Your 20 centavos may have a spot of Bronze disease. I'd be careful about keeping it away from other coins, less they become infected. Check other coins for any powdery green or blue green spots and isolate them from the rest.