SignShop:
Place a sign on a container block (can be anything from barrel to chest):
write the following on the [] line:
1. - [buy] / [sell] / [adminbuy] / [adminsell]
2. - the price to sell / buy (must be a double)
3. - the amount of the item you want to sell
4. - the material of the item

Custom Recipes:
Type the following command:
/su recipe [...]
- create [the name of the recipe]
- delete [the name of the recipe]
- load [the name of the recipe]
- unload [the name of the recipe]
- list

Custom Items:
Type the following command:
/su item [...]
- setcommand [the command to be imbued in the item -> will be executed when right-clicked]
- setname [the new name of the item "&" will be replaced with "§" for colors]
- addlore [add a line to the items lore]
- setlore [completely replace the items lore with this string]
- setglow [wheather the item should have an enchantment effect or not]


Please remember that this plugin does not support multiple languages as it is for private purposes only (I only uploaded this so that I can update it more easily)

Also the plugin needs Vault and a corresponding economy plugin (like EssentialsX)

And last but not least: Yes there are tabcompletes for the commands, so it should be relatively easy.