AMD already announced that its Ryzen 7 lineup will be available for pre-order from 185 retailers/e-tailers and boutique OEMs from February 22nd, with the official launch expected on March 2nd, and it appears that all those companies are living up to the promise.
All three Ryzen 7 CPU SKUs are available for pre-order at Newegg.com, with the exception of the Ryzen 7 1800X, which is already marked "out-of-stock". The flagship is priced at US $499.99 while Ryzen 7 1700X and Ryzen 7 1700 are priced at US $399.99 and US $329.99, respectively.
The two lower priced SKUs are available for pre-order with precise March 2nd release date and hopefully, they will ship on the same day.
Newegg.com also listed plenty of socket AM4 motherboards from usual suspects like ASRock, Asus, Gigabyte, MSI and Biostar, with the cheapest one, priced at US $79.99 coming from MSI, the MSI B350M Gaming Pro. These motherboards based on AMD B350 chipset range from US $79.99 to US $129.99, depending on the features.
The cheapest motherboard based on X370 chipset comes from ASRock, the X370 Killer SLI/ac and it is currently up for pre-order with a US $139.99 price tag. In case you are shopping for a high-end motherboard, ASRock and MSI hold the crow with the Fatal1ty X370 Professional Gaming at US $239.99 and the X370 XPower Gaming Titanium at $299.99.
There are plenty of retailers/e-tailers with listed parts but it appears that CPU and motherboard won't cost an arm and a leg and there are plenty of different motherboards for everyone.