Shipping cost is part of it. I try to combine orders as much as possible. Feels wasteful to me to order every little thing that pops in my head individually, and having it shipped individually. Due to Amazon's logistics, you sometimes end up with a bunch of packages anyway, but ordering things together minimizes the risk.
Stuff that's on the 'order soon' list...
brown bread
salty licorice
maybe candy for halloween. I usually give out fullsize semi premium candybars, but with covid, I'm not sure what's going on. I might get deluxe granola bars. That way, if there aren't many kids, I won't be stuck with a bunch of chocolate.
copper rivets
maybe a new powertape
I'm sure I'm forgetting stuff. I should write things down as I think of them, but I seldom do :^/