how much does a peso cost? a bran new one? do poeple collect new peso, please help?

Answer 1

How many of what denomination do you need? Figure about 10.7 to US$1, plus postage (coins tend to be somewhat heavy).
Are you collecting the commemorative 100 peso coins, too?

If you want year sets, check out the Banco de Mexico web site:

http://www.banxico.com.mx/billetesymonedas/servicios/ventadeprod/venta_juegos_monedas_curso_legal_sin_circular.html

Answer 2

http://www.exchangerate.com/

why would anyone collect a peso? even a new one