Guild Wars 2

I would add in cash-shop an item called “Waypoint subscription” which offers free travel between the unlocked WP on a character
- WP subscription for 1 day – 25 gems
- WP subscription for 3 days- 75 gems
- WP subscription for 7 days – 175 gems
- WP subscription for 15 days – 375 gems
- WP subscription for 30 days- 750 gems

not a bad idea, especially considering that the prices you suggest cost way more than you’d ever spend in gold on waypoints, given the current cost of gems per gold :P

Players who buy this by cash wont bother anymore for 1 month lets say about waypoit tax. So they can travel to every zone even if they are accros all the world with their lvl 80 characters. They can jump from Orr to see what are people doing in Kessex Hills for example.
Players who buy the gems with ingame money, they will save gold and then run free where ever they want. In this way, they ca save money for the next month subscription or just but it whenever they afford it.
The 1.3.7 days options are presented for people who have certain free time to play. For example one day/ one week off from work or 3 days for weekends
The 15 days is ut for those spending half of the month to gather the gems for the next free half of the month
This system can be used by those who want to support the game but they don’t have interest in spending money on the current gem store items.