Yeah, basically what was said here

Ah that's right, thanks for pointing out my mistake

Still, should 400 be included in the range since it's been listed at 320 for a month? I'm thinking of this part of the Unusual suggestion rules:

"How you should use B/Os: All of this does not mean that B/Os are not useful. Use B/Os to give a general sense of your range. If a hat remains unsold for a month with a B/O of 20 keys, a sale at 30 is probably an outlier. Use them to check whether your suggested range makes sense. Just don't use them as the only proof to set both your range."

Of course, now that I realize the 400 sale and the 320 key listing came from different people, I'd understand if this doesn't matter in this case. Still, thought I'd ask anyway!