You didn't reach the next ebay bid increment.
Because this comes up often, the following was posted by Steve (forum member) on 4/30/03 at 7:30 AM:
eBay Bid Increments
Current price
$0.01 - $0.99 = $0.05
1.00 - 4.99 = 0.25
5.00 - 24.99 = 0.50
25.00 - 99.99 = 1.00
100.00 - 249.99 = 2.50
250.00 - 499.99 = 5.00
500.00 - 999.99 = 10.00
1000.00 - 2499.99 = 25.00
2500.00 - 4999.99 = 50.00
5000.00 and up = 100.00
This is a function of ebay, and has nothing to do with AS.