You're missing Cisco's margins from the gain. Cisco is taking an easy 50-70% markup above base hardware costs... That switch is $2.5k USD "new". Even if it cost

You're missing Cisco's margins from the gain. Cisco is taking an easy 50-70% markup above base hardware costs... That switch is $2.5k USD "new". Even if it costs you $300 for parts and a bunch of hours you're still making a ridiculous amount of money.