Here is a list of some of the popular AMD A320 series motherboards from different manufacturers, along with a brief overview of their features and specifications:

1. ASRock A320M-HDV: This micro ATX motherboard from ASRock features support for AMD Ryzen processors, 2x DDR4 memory slots, and 1x PCI Express 3.0 x16 slot. It also includes support for 6x SATA III ports, and Realtek ALC887 7.1 Channel HD audio.
2. Gigabyte A320M-S2H: This micro ATX motherboard from Gigabyte features support for AMD Ryzen processors, 2x DDR4 memory slots, and 1x PCI Express 3.0 x16 slot. It also includes support for 4x SATA III ports, Realtek Gigabit LAN, and Realtek ALC887-VD2 audio.
3. MSI A320M Pro-VH Plus: This micro ATX motherboard from MSI features support for AMD Ryzen processors, 2x DDR4 memory slots, and 1x PCI Express 3.0 x16 slot. It also includes support for 4x SATA III ports, Realtek Gigabit LAN, and Realtek ALC887 audio.
4. ASUS Prime A320M-K: This micro ATX motherboard from ASUS features support for AMD Ryzen processors, 2x DDR4 memory slots, and 1x PCI Express 3.0 x16 slot. It also includes support for 4x SATA III ports, Realtek Gigabit LAN, and Realtek ALC887 8-Channel HD audio.
5. Biostar A320MH: This micro ATX motherboard from Biostar features support for AMD Ryzen processors, 2x DDR4 memory slots, and 1x PCI Express 3.0 x16 slot. It also includes support for 4x SATA III ports, Realtek Gigabit LAN, and Realtek ALC887 7.1 Channel audio.

Each of these motherboards has its own unique features and specifications, and the choice between them will depend on the individual needs and preferences of the user. However, they all offer a solid foundation for building an affordable AMD Ryzen-based system.