I created 3 wiki pages in the last few days:
The first two are price comparison tables. They're static, and are useless unless manually updated, but serve as reference for a cross section of prices at some point in the past, and give an idea of how one should go about comparing prices against ratings and composition. They could include in the future info about those products industry secrets, fake products and consumer fraud.
The third one is a list of tips and ideas on how to save money with household items (the first one is a tip on how to make cheaper and better dishwashing powder with 3 grocery store items). Please feel free to add your own tricks.
Gringos…yeah okay then.