It's now free :D
https://www.spigotmc.org/resources/auctiongui-1-8-1-19.19015/
Plug & play - no configuration needed, just upload the plugin and enjoy it
The best anti-dupe protection, even better than on some popular servers
GUIs can be refreshed automatically (depends on your choice)...
Now its free :D
https://www.spigotmc.org/resources/1-13-1-19-3-%E2%AD%95-advancedpets-%E2%AD%90-16-animated-custom-pets-plugin-%E2%AD%90-vanilla-and-custom-pets-%E2%9C%85-35-sale.99971/