Micro Center says the deal is available at its retail stores only and not online. The official Apple Authorized Reseller has 25 locations across the United States, many of which appear to be open this Saturday and Sunday.
The best deal we had previously seen on the base model iMac Pro, which starts at $4,999 from Apple, was a $250 discount from Best Buy that dropped the price to $4,749.99 earlier this week, so this is an impressive sale.
Micro Center says the deal is limited to one per household, and supplies are likely extremely limited, so we recommend calling ahead if you are planning on visiting one of their stores. There's no indication when the sale ends, so act fast.
The base model iMac Pro is equipped with a 27-inch 5K display, 3.2GHz 8-core Intel Xeon W processor, 32GB of ECC RAM, 1TB SSD storage, Radeon Pro Vega 56 graphics with 8GB HBM2 memory, 10Gb Ethernet, and four Thunderbolt 3 ports.
(Thanks to Steve, Johnny, and other readers who tipped us!)