Per-unit cost pulls you toward a truckload. Handling, cash and risk pull you back toward pallets. Here is how to work out which side you are actually on.
A full trailer holds around twenty-four pallets. The per-unit cost is lower, and across that many pallets the averages settle down, so a truckload behaves more predictably than any single pallet in it.
Take how long a single pallet of the same class took you to sort and sell. Multiply by twenty-four. If that number is longer than you can afford to have cash tied up, buy pallets.
Most people should buy several pallets first. There is no penalty for it, the difference per unit is smaller than a failed delivery costs, and you learn the handling on something you can physically move.
A truckload ships to one address as one delivery. Splitting it with someone afterwards is your business, but the order, the payment and the signature are all yours.