I was thinking of creating a Price list for the items that are posted for sale.
It is not an obligatory list. Everyone can sell at any price he/she wishes.
It will just be a guide.
It is a spreadsheet created with google drive.
Those that are interested to help just send me a PM.
There will be a personal page for every one that wishes to help. You will set there the min and max or directly the average price you think is appropriate for every item.
You don't have to enter prices for all the items. just the ones that interest you.
https://docs.google.com/spreadsheets/d/1QkkgyKcZSRDUms9y7sNSg_iSHtaInlmJsA1j3fEP3ZQ/pubhtml
The list is not complete. More items will be added in future.