What does the phrase "motos usadas en venta" mean?

"Motos usadas en venta" in Spanish translates to "used motorcycles for sale" in English. Most likely this was an ad for used motorcycles targeted towards Spanish-speaking people.

The phrase in its entirety means "used motorcycles for sale." According to SpanishCentral.com, "motos" means "motorcycles." The word "motos" in Spanish is short for the Spanish word "motocicletas." Thus, the word "used" is translated as "usadas" because the noun ("motorcycles") must agree in gender and number with the adjective ("used"). The phrase "en venta" means "for sale." This phrase was probably posted to indicate to Spanish-speaking people in the area that used motorcycles were for sale.