I am wondering about one thing-- if someone is paying $7,5 per ounce of silver on the market, why others are selling OLD coins for $6.5 per ounce? Is it a matter of amount of the silver? Can u possibly resell it at market price?
That is market price. Silver coins are only 90% silver - not pure silver. And if sold for their silver content - the cost of melting and refining the silver must be taken into account. Also - you need to realize that even with pure silver - when selling about the best you can hope for is 10% less than spot price. When buying 10% more than spot price. This is how bullion dealers make their money - it is called the spread.
Well that is logical, but pretty often people need exactly 90% silver-- jewelry production, coin minting, and I guess they get silver in lingots and have additional problems in making a new alloy?