I am a big fan of The Big Issue. It is a very enjoyable read plus it helps whose who sell it.
The cover price has been $4 for the last couple of years. This has been a good price, as it is easy to give the seller a fiver and not ask for change. This means the seller gets $3 for selling the issue instead of $2.
I noticed in the latest issue that the price will soon rise to $5. This means I can’t easily tip without awkwardly giving an extra coin. I was thinking of paying with three $2 coins, but this means saving up the three coins before going to buy an issue, wheareas most of the time I have a fiver in my pocket.