I beg to differ about the use of a comma before "and".

Read this:

"He gave him a bunch of guns including Uzis and pistols, and his Godfather movie collection."

The comma before "and" is to insure the reader's understanding that the author does not consider that the Godfather movie collection is neither a bunch nor tools, but that the Godfather movie collection was, indeed, given.

Such may seem obvious, but it can be a critical way to separate people, things, and ideas within the same sentence. Capisce?

"Generosity. That was my first mistake."
"Experience must be our only guide; reason may mislead us."
"Instagram is Twitter for people who can't read."