It ain’t hot if it isn’t GoT!
Top traded items
Well, now since bulk requests are available, you could just flavour your item database with the top buy/sell prices and run a cronjob to get the most recent data for these in chunks of 200 items per request.
Then for example just do a SELECT * FROM items_table WHERE … ORDER BY top_sell DESC.
You have to download all items and than check the item with more sells/buys, use http://wiki.guildwars2.com/wiki/API:2/commerce/prices if you only need quantity of sells/buys with their relative lower/higher price.
Content Marketing Manager, French
I remember from the old tradingpost that there were top traded/most expensive/etc lists.
Our API dev tells me that that data was never accurate or timely, and that you’d be better off aggregating everything using the /v2/commerce/listings API and determining this for yourselves.