or assume worst case as in assume the best poosible SW in the arrival order (which is the worst case when trying to show SW is low) ]]>

Tie breaking can be arbitrary. Assume worst case option (this should help you). ]]>

Is it enough to show an example that will work for any static prices where the prices are different?

I think I have an example - but it breaks when all prices are equal.

Also, can we assume how players break ties? does it happen in an arbitrary order? or can we determine the tie breaking for every player as part of his valuation function?

Thx

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