Add `PricesCsv` #331

Job	Run time
check-black	18s
build-and-test (ubuntu-latest, 3.9)	35m 55s
build-and-test (ubuntu-latest, 3.11)	30m 24s
build-and-test (macos-latest, 3.9)	43m 43s
build-and-test (macos-latest, 3.11)	44m 41s
build-and-test (windows-latest, 3.9)	36m 17s
build-and-test (windows-latest, 3.11)	36m 3s
	3h 47m 21s

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