After recently having a rather harrowing experience accidentally purchasing a costly 5th Dominion Mark 3 cannon, I would like to suggest a confirmation of purchase box for the battle market. At least for badge heavy items (over 50 in cost or something similar).
It would save you guys having to deal with innocent mistakes, and potentially not-so-innocent fraud attempts, if such a thing actually happens. It might also save someone's life, as my heart almost stopped when I watched 128 red badges essentially vaporize into what would only have been 16-32 CTP.
My situation was rectified quickly and professionally, but after this experience, I can handle an extra click to avoid a heart attack.