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Eric BIf YOUR bid was $1,000 and someone else bids the next increment of $1,100, you must now bid $1,210. That's a 21% increase. Not 10%, not 12%, and certainly not 30%.
Even if you know that nobody else will bid more than $1,100, you must go to $1,210 to win it unless you have 2 bidder ID's and can use your second bidder ID to beat your first one to get to $1,100.