Used Cisco Catalyst 3500 XL 3548

The Cisco Catalyst 3500 XL is ideally suited for enterprise wiring closets, branch offices, and medium-sized local-area networks (LANs), delivering best-in-class performance through its 10.8-Gbps switch fabric and deployment flexibility with a wide array of wiring closet connectivity options.
You can deploy a variety of switch stacking configurations using the Cisco GigaStack Gigabit Interface Converter (GBIC). 

• Ports: Forty-eight (48) 10/100 Fast Ethernet ports
• Management ports: One (1) RJ-45 Serial console port
• Management protocols: SNMP
• Expansion: Two (2) GBIC Slots (GBIC Modules included)
• Firmware Version: 12.0(5.2)XU
• Power Supply: AC (DC module not included.
• Flash Size: 1 MB
• NVRAM: 32KB
• DRAM : 16MB
• Rackmounts: Unit comes with fixed rackmount brackets.
• Serial Number: FAA0453G0A7
• Model Number: 3548
• Part Number: WS-C3548-XL-EN