Final Fantasy XIV Database - Ffxivpro.com

It would be interesting to see your transaction history for just 1 particular item.

However, it will be just limited to yourself, I don't think they will add the ability to track other players, due to the fact that those players may not want other players to view their history.

Then for those that don't sign up to the site, ( RMT and players included ) their transactions are limited to 25, and I also don't think that we will be allowed to go farther back then 25 transactions.