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There is a pull request (that has been pushed live now) that fixes the raw data stored by the blockchain. Hive Engine provides a market history for NFTs but it is still limited to 24 hours.

The problem was if I wanted to recreate past transactions there was not enough data to do so as the data stored was incomplete. The pull request fixes this, allowing me to look up past transactions and know with 100% certainity what the final price was. Prior, I had to add the market and agent fees to the final price and hope that only one NFT was purchased in the same transaction.

Thanks for the clarification. I'm looking forward to the new market history. Provenance tends to play a significant part in the valuation of trophy veblen goods, it would be a shame to not have that fully captured.