I just received some of the coins (no pictures because I do not have a camera) The Indian Head Penny was what was shown on Ebay, but looked better in person. The blemish/ hole is not as noticeable so the overall appearance is better. Overpaid for the coin, but I am not upset about it. Also, he sent a proof 1976 penny along with the package. The 1976 penny is not worth much but I am willing to keep the lot. The dime is like the penny looks better in person than on line. Especially with the cc mint mark, this one will be kept also. The quarter does have some dirt on it(looks like to me but who am I to say). Would I be safe using a bit of soap and water to find out? The three cent piece was a complete scam. It did not even have a proper holder to keep it in. It was placed into a tiny envelope with nothing else to protect it. I probably will send this back. The rest should come in tomorrow or the next day. I will update this post then. Also, I will still take the coins in for an experienced person to check them over probably Wednesday or Thursday.
First do not clean the quarter - it takes experience to remove debris off a coin without causing any damage. I would not recommend it. As for the little envelope - lots of dealers will ship coins in a small brown envelope - so do not be surprised if other coins coin in those. Usually they wrap cardboard or something else around the little brown envelope.
Not sure what the envelope looks like, but a lot of dealers use little 2X2 paper envelopes. It's the preferred storage medium for the large cent collectors. You'd be amazed when some of the big time dealers pull out a little paper envelope with a 50K coin in it, no joke... Do a search for xylol in regards to conserving coins. It's a solvent which does not affect the patina of coins, and can be used to remove surface dirt/grime. People say, 'never clean a coin', but what they mean is do not do anything to change the surface of the coin. If it has dirt on it that is another story, but you should take the time to learn how to do it properly.