Math Trades
OLWLG Based Trades
OLWLG based trades utilize a specially formatted BoardGameGeek geeklist and geeklist items.
The OLWLG app can synchronize your BGG collection and assist you with adding 'For Trade' items to the geeklist.
With ShelfScan, you can add items to an OLWLG geeklist from any part of your collection. Using the ShelfScan extension you can automatically add items without having to submit a form for each.
If you find the OLWLG useful, please Donate
Swaptagon Based Trades
Swaptagon is a new platform used for Math Trades of any kind of item.
ShelfScan integrates with Swaptagon by allowing you to export a file with game condition data, images, etc. for bulk importing into a swap event.
A userscript (and possibly soon the ShelfScan extension) will allow you to import the file from the Swaptagon site.