Cheapest CISCO switch or ADSL router that can do port mirroring

[SoundsGood]

Hi,

For security/curiosity reasons I'd like to set up a mirrored port for one of the devices on my network, does anyone know a cheap switch or ADSL router that has this feature? Cisco vastly preferred.

Cheers,
SG

 

[SoundsGood]

Needs to be Cisco really, may as well make use of my CCNA!

 

[SoundsGood]

Sure I could trawl through Cisco's back catalog but I'm looking for recommendations