Buying at the lower-end is pretty tough with these unless you are a fairly large customer. The reason is that the platforms are lower volume and thus cost more. The chips themselves are actually not "that" expensive compared to x86 list prices.
I think they need to have the 80-128 core chips priced at no more than $2K ish to compete with x86 at cloud customers. So the lower volume servers and motherboards will end up costing more than the 32C parts.
As noted in yesterday's GB motherboard, another challenge is that getting a heatsink outside of an OEM system is very hard.
I know that is not the best answer, but just something to keep in mind. If you are buying a few racks, then these are now easy to get. If you are trying to buy a single server the prices will be very high because the supply chain is not set up for it.
Actually, this is a great point that we do not cover enough.