I have been too quite a few coin dealers and to me most of them are dishonest and will low ball you so far low its not even funny. Not only is Lou (short for Lucien I think) a fair guy when buying coins, but he has a nice collection for sale himself including a lot of mint sets and proofs. He even has a bucket with some random coins in it. I was able to grab a few decent proofs out of for a decent price. I strongly recommend if you are starting a coin collection for yourself or with your kids, to go here. He is an honest guy and if he does not know the answer to something he will not BS you, he will just tell you he does not know.
PS: He has some nice stamps as well, and paper currency.
Stay away from those other dealers, especially the ones in Boston and the other guy in Norwood and go here first. If you are trying to sell coins, he will give you a really fair price.