Just saw this one on eBay. 40gbe and 10gbe ports plus 48 gigabit Poe ports for 800$. Should make for a really nic lab switch
Juniper EX4300 PoE+ (EX4300-48P) 48 Port GbE PoE Managed Switch Reset *Warranty*
Juniper EX4300 PoE+ (EX4300-48P) 48 Port GbE PoE Managed Switch Reset *Warranty*