In the OP, would the first sentence benefit if it were to have a comma before the word "to" near the end, as this:
"After a sale, realtor will send customer a gift basket, flowers, or something similar, to their new home."
Without the comma, it seems like the gift might be expected somehow to resemble the new home...
In IRC Section 7701(a)(1), is the word "a" extraneous before the word "trust," and would the Oxford serial comma people like to have had a comma between "company" and "or"?