I just started to auction some of my duplicate chips on eBay. I had three auctions that completed over a week ago. All of the buyers said that the would send payment. None received yet. One buyer replied to my email that his payment was late and I would receive it soon. 2nd buyer has not responded. 3rd buyer said that I should see the payment by Paypal soon.

Is this just coincidence or is this a typical situation on eBay? How long should I wait before doing something? I looked up feedback for the buyers and it all looks OK, no negatives. Am I missing something here?