Most US prep centers charge per service, per unit. FNSKU labeling typically runs $0.20 to $0.50, poly bagging $0.30 to $0.70, bubble wrap $0.50 to $1.00, bundling $0.50 to $1.00, and oversize prep $1.00 to $3.00 or more. Simple products land near the low end. Fragile, oversize, or multi-step prep lands higher. Prices vary by provider and volume, so confirm the rate card before you commit.
Prepping in-house has no per-unit fee, but it costs your time, materials, and space, and mistakes get expensive when Amazon charges unplanned-prep fees or refuses a shipment. A prep center charges per unit but preps at volume and knows Amazon's current specs. The break-even depends on how many units you move and how complex the prep is. Low volume and simple products favor doing it yourself. High volume, multiple categories, or fragile goods usually favor a prep center or a 3PL.
A prep center preps your units and forwards them to Amazon, and that is the whole job. A 3PL preps FBA inventory and also holds your stock to ship FBM and direct-to-consumer orders itself. If every order goes through FBA, a prep center may be enough. If you also sell on your own store or want one warehouse instead of two, a 3PL covers both from the same inbound shipment.
Simpl runs Amazon FBA prep as a core service and publishes its fulfillment pricing: order fulfillment starts at $7 per order and includes 3 picks, postage, and packaging, on a $750 per month pay-the-difference minimum. Per-SKU prep pricing depends on your products and prep steps, so the fastest way to a real number is to get a quote.
There can be. Standalone prep-center quotes sometimes list a low per-unit label fee, then add receiving, storage, and forwarding on top, so the total lands higher than the headline. Ask any provider for the full picture, meaning per-unit prep, receiving, storage, and outbound, before you compare. Simpl publishes flat-rate fulfillment pricing with picks, postage, and packaging included and no hidden fees.
