Creative

The plot upgrades are UPGRADES, that means you have to buy 4 before 6, and 6 before 8. You can't skip to 8! 

Permanent WorldEdit,
5.00 GBP
Buy
Upgrade to 4 plots
5.25 GBP
Buy
Upgrade to 6 plots
3.75 GBP
Buy
Upgrade to 8 plots
3.75 GBP
Buy
Upgrade to 9 plots
1.75 GBP
Buy