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> Sorry, all domain sales have been suspended. We no longer register nor transfer already registered domain names to new owners.

Dang..

Gandi appears to still allow registration of them: https://www.gandi.net/en/domain/tld/su.

I didn't actually register one, but they quoted a price of $28.31 for the first year then $63.98/year afterwards.

They also operate out of New York.