We've recently procured a shipment o' sands an' oil o' time. Ain't nothin' more effective for restorin' old arms an' armor to mint condition, I tell you. If you're interested, I can fix you with some in exchange for mark logs.
These logs are kept by them as chase after elite marks in the Hunt, the bounty system what the Eorzean Alliance set up. In their lust for riches an' glory, hunters often end up dead, leavin' behind their worldly possessions.
Why do we want these, you ask? Let's just say there's a small but dedicated group o' people who derive pleasure from gettin' a peek at the lives o' the dearly departed. There's good coin to be made in satisfyin' their morbid taste.