I have two HP Procurve switches which I'm selling. If you are interested you can get in touch off-list for further discussion. Below is a brief description of their features with more on the links shared.

HP Procurve 2824 and 3400cl:

Layer 3 managed switches

24 Gigabit Ethernet ports with 4 SFP ports

VLAN support capability

Easily stack-able

Still in great condition

Procurve 2824 -- http://www.newegg.com/Product/Product.aspx?Item=9SIA4MR3W84379 

Procurve 3400cl -- http://www.newegg.com/Product/Product.aspx?Item=N82E16833316037 

Regards,

Duncan