Your search for "DCS-7150S-52-CL-R" revealed the following:
Arista DCS-7150S-52-CL-R 52x 10GB SFP+ B-F Air (High Precision Clock) Switch
SKU: NSH-7475
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 207.99
• 20 in stock
Call if you need more
Arista DCS-7150S-52-CL-F 52x 10GB SFP+ F-B Air (High Precision Clock) Switch
SKU: NSH-7474
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 184.99
• Only 2 remaining
Call if you need more
NEW Arista DCS-7150S-52-CL-R 52x 10G SFP+ R-F Air (High Precision Clock) Switch
SKU: NSN-2455
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista DCS-7150S-52-CL-F 52x 10GB SFP+ F-B Air (High Precision Clock) Switch
SKU: NSN-2425
Condition: New
Shipping: Overnight Options
Warranty: 365 days