Weekly.

[ It's actually not too far from where he lives, though. He figures he will explain a few things while they are on the way though. ]

If you see anything you recognize as value, don't say it out loud or they may try to raise the price when we barter.

[ Midorima's been doing this a while. ] We'll need to decide on a signal ahead of time if you see something valuable.

[ Since Midorima will then.. barter it down even lower. B| Once Kise sees him do it once or twice, he'll let Kise try to barter. ]