Knowing what items to vend,

[HM02Productions]

I mean I did an "ok" vend. Made 58b from 24b, so i guess thats ok?? But how do people make vends from 20b to 100b.  

[Fenix_Professionals mule]

HM02Productions

I mean I did an "ok" vend. Made 58b from 24b, so i guess thats ok?? But how do people make vends from 20b to 100b.

You could hoard items that dropped in price some of them usually rise back again it could take from days to weeks and some times months. You need to study the graph of the item before hoard it and be sure that is enough popular to take the risk. I don't recommend to artificial inflate them, just wait them to rise up.

Or you can go to exchange forum and find deals cheaper than marketplace and resell.