Hey,

I'm a Spigot/Bukkit Java dev and I've been making plugins for a while. I've also worked with multiple servers and published a few of my plugins.

Custom plugins start at about $25, may be more (for things like minigames) or less (simple fixes or updating mods) depending on what you want.

Check out my GitHub for plugin source: http://www.github.com/scarabcoder
Most recent plugin: https://www.spigotmc.org/resources/timerankup.34875/