I’ve seen stuff with 30-40 watchers on a buy it now sale, and been left thinking, ‘thats a hell of a good price, what are they waiting for’, before snapping it up myself.
On auctions i dont think it matters. Sold items that had plenty of watchers, but on end time only a couple actually bid. TBH I dont think anything can be inferred from the number watching it.
One of the reasons I put most things on buy it now, or if I had a large number of bits to sell, most were buy it now, with a handful on auction to ‘attract’ potential buyers.
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On auctions, most people are paid at the end of the month, so probably the best time to have it finish is in the first few days of the next month.