Learn Spanish (Latin America): Las entradas fueron muy baratas el año pasado.

In Spanish, to say "last year" or "last week", you use the adjective pasado (meaning "past"). El año pasado literally means "the past year". The word último usually means "final", like the last chapter of a book.

Why does this sentence use fueron (from ser) instead of estuvieron (from estar) to talk about the price?

We use ser to describe the basic qualities or characteristics of an item. Even though prices can change over time, being cheap (baratas) is treated as a characteristic of these specific tickets, so we use fueron.

We are describing something in the past, so why do we use the preterite fueron instead of the imperfect eran?

While past descriptions often use the imperfect, the time phrase el año pasado gives us a clear, completed time frame. When you sum up a state or event that is completely finished in a specific past period, you use the preterite.

Can I use entradas for any kind of ticket?

No, entradas specifically refers to admission tickets for events like concerts, movies, or sports games. If you need a ticket for travel, like a flight or a bus, you would use boletos or pasajes.