The price of a DVR board is primarily driven by its processing capabilities and channel density. Buyers should prioritize boards equipped with H.265+ video compression technology, which significantly reduces storage costs and bandwidth usage compared to older H.264 models. Ensure the board supports the required resolution (e.g., 5MP, 4K, or 1080P) and check the frame rate (FPS) per channel; a 'Lite' version is often cheaper but may only offer 12-15 FPS, whereas professional-grade boards provide full 25/30 FPS real-time recording. Additionally, verify the chipset brand (such as HiSilicon or Novatek), as high-end chipsets offer better stability and image processing.