Your search for "DCS-7304-CH" revealed the following:
Arista DCS-7304-CH 7300X Series 7304 Switch Chassis Only
SKU: NSB-2837
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7304-CH 7300X Series 7304 Switch Chassis Only
SKU: NSN-8071
Condition: New
Shipping: Overnight Options
Warranty: 365 days