Trilobytes VX Ace: Shop Unlocks

This is a script which allows you to use notetags in items, weapons and armours that will require you to sell a number of other items to a shop in order to unlock that item for purchase. It was originally written as a commission for Clyve back in 2012 but as it's been 5 years and he doesn't appear to be part of the community any more I decided to release it to the public under my Trilobytes brand.

Features
- Make unlockable items in the same vein as Etrian Odyssey.
- Adds categories to the buy window.
- Compatible with Yanfly's Ace Shop Options script.

Current version
1.03

Changelog

1.03 12/06/2012. Fixed a bug where closing the shop and reopening it would result in weapons/armour being removed from the list if the item or weapon with the same ID had already been added.
1.02 11/06/2012 - Fixed a compatibility bug with Enelvon/Seiryuki's sell-only script and Ace Shop Options where Sellonly made my category confirm code crash.
1.01 08/05/2012. Compatibility added for Yanfly's Ace Shop Options
1.00 07/05/2012. Original release