There are some Bitcoiners who sell goods priced in Bitcoin.
Discussion
without looking at the fiat valuation?
The closest I could think of was nostr:npub1ge0tzdqy6useekgu9d9g5l3s3t2wpx7p9xxuprz7ajzjaxl4mgyssejcs3 who's damn near autistic about pricing things directly in Monero. but I think he uses the 162-day moving average to establish a valuation.