The city of Santa Fe bought about 225 guns at its second no-questions-asked gun buyback event.
The Santa Fe New Mexican reports that would-be gun sellers formed a line at a police building before Saturday's event began.
Within four hours of the sale beginning, police ran out of gift cards to pay sellers with and had to issue rain checks.
Authorities purchased 194 guns at the city of Santa Fe's first gun buyback event in January.
The buyback program was approved late last year in the wake of the school shooting in Newtown, Conn.
The city is planning a third gun buy-back event on March 9.