Leopoldo Calderon Mendez the so called in ebay as polocalderon HISTORIA POSTALYFILATELIA stampterr tiev filateliademexico castlerock30 castlerockstampsplatinum castleplus mexicancoins and many other nick names, also poses as Gabriela Zapata Pascalis he uses to perpetrate his scams. He is in every word a professional Scammer. He constantly changes his name in order to erase all the scams and frauds, he is committing during the time he is using his fake nickname. He sells forged, altered and misrepresented stamps from local Mexican forgers. He was expelled from the local Club in Puebla, Queretaro, Guadalajara, Monterrey, Amexfil, Cofumex and many other clubs and federations in Mexico. He is very well known as a fraudster in Mexico. If you have any question about his reputation you can call the Federacion Mexicana de Filatelia and speak with Mr. Salomon Rosenthal, or the local Stamp Clubs in Mexico. He will testify what I'm saying is true.