Your search for "MA-PWR-250WAC" revealed the following:
NEW Cisco Meraki MX450-HW 10 Gbps 10x SFP+ 8x SFP 8x RJ45 Unclaimed Firewall
SKU: NSN-3781
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 2,584.99
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NEW Cisco Meraki MA-PWR-640WAC 640W AC PoE Power Supply for MS250, MS350 Series
SKU: NSN-5460
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco Meraki MS350-48-HW 48x 1GB RJ45 4x 10GB SFP+ Unclaimed Switch
SKU: NSN-4164
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco Meraki MS250-24-HW 24x 1GB RJ-45 4x 10GB SFP+ Unclaimed Switch
SKU: NSN-3907
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco Meraki MS410-32-HW MS410 32x 1GB SFP 4x 10GB SFP+ Unclaimed Switch
SKU: NSN-3587
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco Meraki MX450-HW 10 Gbps 10x 10GB SFP+ 8x SFP 8x RJ45 Unclaimed Firewall
SKU: NSH-9928
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days