how do you get miller to tier 2?

[bfc]

wanna buy hops

[MutateYourself]

Buy his seed.

[MutateYourself]

He takes a while producing more, it happens in old age.

[CloversDrop]

Trade with him or make a prosperity surmon and trade the commerce certificates it drops when you use it in a surmon.

[FluffyGuy]

there's a prayer that you can do that gives you something that you can sell the vendors that will increase their t r quickly I think

[Gabriel]

conver wheat into flour, and sell the flour to miller and the farmer, thats how I got both of them to tier 3 pretty fast

[jgtogi]

It might be bugged. Does it repeatedly say come back to tommorow no matter what day it is?

[xenxander]

You can also sell but loads of fire wood to them
I did that and it not only netted me an okay income but upgraded most vendors.

[Tehrock]

I just bought the hops and hops seeds he had, sold them, re-bought them and so forth. Only ended up down 20 silver or so when his next tier unlocked. Any of the vendors can be done this way too.