Online Arbitrate (OA) FBA Prep Services

Looking for a reliable, accurate, and trustworthy prep center to process your OA FBA products? Tired of getting lost in the shuffle at the big 3PL warehouses that offer more than FBA services? Want to know where your products are every step of the way?

With Prep Ninjas, you and your team and track every unit with your customized Prep Ninjas Dashboard. Whether you need help with a one-time project or an ongoing service partner, Prep Ninjas’ team of trained FBA specialists are ready to assist.

How it works

Click the “Sign Me Up” button at the bottom of your screen

Simply fill out the form and you’ll get an email walking you through the account setup process.

Sync your Amazon account

Follow the easy step-by-step instructions to sync your Amazon account with your dashboard. Syncing allows us to access your inventory list and create shipments. 

Start Buying

For every order you place with a supplier, simply create an Inbound Shipment on your Prep Ninjas dashboard. 

Your Prep Ninjas Dashboard

Do you hate the hassle of using spreadsheets? Are you tired of emailing labels? Do you wish it were hassle free?

Our software syncs with your Amazon account which saves you valuable time and eliminates stress. Simply open your dashboard, create an Inbound Shipment for each order you send to us, and track them until they reach Amazon. 

Once we receive your order, we’ll check in the products received and notify you of any problems. Once per week (or more frequently in some cases) we send what we have received to Amazon. Easy peasy.

Sample Dashboard Screenshot


Our simple pricing structure makes it easy to figure out your prep costs. Just pay for the services you need. No minimums. No commitment. No signup fees. For a detailed explanation about our pricing and what you can expect, see our FAQs page

FBA Prep & Shipping


Standard Carton Receiving Charge = $1/carton
Pallet Receiving Charge = $10/pallet

Oversized Carton Receiving Charge = $2/carton
(Oversize cartons are any package received over 25″ on longest side or over 50 lbs)

FBA Shipment Processing Charge:
Processing charges are calculated based on the number of units in each shipping plan. OA shipping plans are processed once per week unless previously agreed upon.
1-39 units = $40/shipping plan
40+ units = Fee Waived

Standard Unit Processing Charges:
Includes FNSKU labeling. No price reduction for prelabeled or no label items.

Standard units = $0.95/unit

Large units = Add $0.60/unit
(Large units are any unit over 11″ on longest side, 8″ on median side, or 5″ on shortest side)

Oversize units = Add $2.05/unit
(Oversize units are any unit over 18″ on longest side, 15″ on median side, or 12″ on shortest side)

We do not accept units over 24″ on their longest side without written pre-authorization.

Additional Prep Services

Bundles up to 6 items = Add $0.60/bundle
Bundles up to 12 items = Add $1.55/bundle
Bundles 13-20 items = Add $2.50/bundle

Additional Services = $0.25 each
Standard Sized poly bag, Sticker/Extra label, Sticker/Price tag removal, Bubble wrap (plus materials), Taping, Folding, Box assembly, Rolling, Packaging, Inserts, Tags, Etc.

Extra Large poly bag = $0.80 each

Palletizing Fee = $35/pallet

New Boxes and Materials:
Medium Outbound Boxes = $3.5/box
Large Outbound Boxes = $4.5/box
Extra Large Boxes = $5.5/box
Bubble wrap = $0.25 per cubic foot


First seven (7) days = Free!
8-180 Days = $26.48/cubic meter/month
181+ Days = $36.48/cubic meter/month

Terms of Service

In order to make the services we provide run smoothly, we crafted a document detailing our services and our expectations of you as our client. We love clear communication and hate misunderstandings, so we designed these terms to protect both of us. Please read the terms carefully and ask if you have any questions. When you sign up, you will be expected to sign a digital agreement accepting the terms.

PLEASE NOTE: We do not accept any grocery items. This includes food, beverage, pet food, vitamins or supplements. The only exception is supplements in pill form (capsule or tablet). 

Ready to Sign Up?

We are excited to work with you. In order to make sure we are the right fit for your prep needs, and that we have enough resources to accommodate your business, we ask all our prospective clients to fill out a new account request form. We only have a few spots available and are very selective on who we work with. Currently, we are only accepting clients who meet the following qualifications:

• Amazon store active for at least 12 months
• Customer feedback rating of at least 90% (verified by providing a valid link to storefront)
• Volume of 150+ units per week
• Ready to begin shipping orders right away (within 7 days of sign up)
• Must have read and understood our Terms of Service and Pricing

If you meet these qualifications, please complete the new account request below. If you have any questions, please feel free to ask via email (ninja @ prepninjas . com) or chat.