Now that the border has fully reopened, crossing it is not an issue at all. There are tight restrictions on what types of produce and goods are allowed across the border, mostly cheese, citrus, tomatoes, anything with soil (plants), etc. So as someone else mention, research restrictions before you buy.

It's not uncommon for me to cross the border and see a bag of tomatoes on the concrete blocks next to the border patrol agent. It's a bummer.