I am testing out some scenarios with micro payments...
https://bitcointalk.org/index.php?topic=219504.00.8.2 Release notes
Payments (transaction outputs) of 0.543 times the minimum relay fee
(0.00005430 BTC) are now considered 'non-standard', because storing them
costs the network more than they are worth and spending them will usually
cost their owner more in transaction fees than they are worth.
Such micro-payment is "not welcome" since bitcoin-qt 0.8.2, and I guess no merchant would be selling something for 0.00005430 BTC (less than $0.05).