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The bid you see is not necessarily the current max, lets say:
I bid 25$
You bid 100$ (the bid reads 26ish)
Next guy bids 200$ (bid reads 101ish)
ect.

Hope I understood the question correctly.

Im sure you know this already, but on the off chance you dont (at some point this was a revelation for me) you only pay a couple dollars more then the last guy bid, so just bid 300, and keep your...