Contact
Corrections are welcome and get acted on. If a figure here is wrong or has moved, saying so is useful.
Corrections
If you have found a price that no longer holds, or a figure that was wrong when published, send the source along with it where you can. Corrections are made in the text and the check date updated, rather than quietly edited.
Partnerships and press
Affiliate and commercial enquiries to the same address. Note that sponsored placement is not offered — see the method page for what that means in practice.
Elsewhere
New breakdowns are published on Pinterest as they go live, and the paid guide is on Gumroad.