I bought it
Lo compré por alrededor de doce dólares.
I bought it for around twelve dollars.
I bought it last week.
Lo compré en una tienda de segunda mano.
I bought it at a second-hand store.
I bought it.
No me acuerdo de dónde lo compré.
I don't remember where I bought it.
Lo compré en la estación de tren.
I bought it at the train station.
I bought it for ten dollars.