costeaban
Imperfect ellos/ellas/ustedes conjugation of costear.

costear

Los collares estaban hechos de las conchas agujereadas por la acción del salitre y en muchas ocasiones los surfistas se costeaban sus viajes vendiéndolos a la vuelta.
The necklaces were made of small shells with holes in the middle eroded away by the salt water, which were often sold by surfers in order to pay for their surf trips.
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eve