Question about ebay auctions

It's Thursday...options are...
3 day auction ending Sunday evening
5 day auction ending Tuesday evening
7 day auction ending Thursday evening
10 day auction ending next Sunday evening(additional posting fee)
Which would you choose and why?
3 day auction ending Sunday evening
5 day auction ending Tuesday evening
7 day auction ending Thursday evening
10 day auction ending next Sunday evening(additional posting fee)
Which would you choose and why?
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Comments
You need seven days to ensure that most potential bidders can see it. Although 10 days is nice, as it gives you an additional weekend, I generally find it doesn't help, as most buyers will see your listing within a week.
during playoff time, it depends who's playing and when