These are not for consumers -- these are datacenter-grade systems.

If you want a consumer GPU, you can go for the RTX 4090 (24GB VRAM) or the A6000 Ada (48GB VRAM) if you are building a workstation.

If you really need to "experiment" on an A/H100, then you can rent it by the hour through a cloud provider like Runpod.

To elaborate: you can't really buy these except in specific configurations from Supermicro (usually 8x H100) or the like. So take whatever chip-specific cost you have in mind, and 8x it, and add on the cost of CPU/memory/storage. NVIDIA doesn't bother to sell these in a configuration that you can plug into your desktop.