The fee is based on what you buy. SalesTax doesn't apply if you buy over a certain amount. I believe it's $1000. I could be wrong. It's been a while since I bought through them.
This. I sold some coins there for a client who couldn't otherwise cover his bill. This must be the end of days, lol.
No sales tax if over $1000 transaction in MA. I also believe Boston Bullion will accept payment in cash for PMs. They will pay you out in cash if you are selling, but charge you an extra 2% for that, otherwise you get a check (I had them make it out to my client).
They also sell bullion cast into the shape of bullets. I got to handle some while I waited. The silver 10oz .50 BMG is kind of cool, but if it were me, I'd stick with the coins or bars.
They have a website with more details. They were easy to deal with unloading some coins, paid me spot or better, and even had the cash payment option. No 1099 unless a large transaction.