Calculate the deal before you place the bid.
A practical workflow for estimating total cost, resale proceeds, net profit, ROI, and the highest bid that still leaves room for risk.
Choose a Free Calculatorminus your risk allowance
minus your target profit
= maximum total acquisition cost
Build the bid from the exit backward.
The useful question is not “How much is retail?” It is “What will I realistically keep after this item sells?” Start with the likely exit price, then subtract every cost between pickup and payment.
Estimate resale value
Use recent comparable sold items when available. Adjust for condition, missing parts, model differences, demand, and how quickly you need the item to sell.
Subtract selling costs
Include marketplace fees, payment processing, promoted-listing costs, outbound shipping, packing materials, returns, and discounts.
Price the uncertainty
Reserve money for testing, repairs, missing accessories, pickup time, storage, and condition that is worse than expected.
Protect your profit
Subtract the minimum dollar profit you require. What remains is the most you can spend after auction charges—not necessarily the hammer bid.
A $300 resale does not mean a $300 opportunity.
In this illustration, $120 is the maximum total acquisition allowance before converting it into a hammer-bid ceiling. The current buyer premium, applicable tax, pickup, and any other acquisition costs still have to fit inside that amount. This is an educational example, not a valuation or statement of current auction terms.
Estimate a safe bid for your pickup area.
Each calculator starts with a local tax estimate you can change. Always confirm the charges shown by the auction before bidding.
Nellis Auction profit FAQ
How do I calculate a maximum bid?
Begin with conservative resale proceeds. Subtract all selling, fulfillment, risk, and profit requirements. Then account for the current buyer premium and applicable tax to solve for the hammer-bid ceiling.
Which costs belong in the estimate?
Include the winning bid, auction charges, applicable tax, pickup or delivery, testing, repairs, missing parts, marketplace fees, shipping, returns, storage, and labor when relevant.
Is retail price enough?
No. Retail is a reference, not a likely payout. Comparable sold prices adjusted for condition and selling costs produce a more defensible estimate.
Move inventory from purchase to eBay sale without rebuilding the item record.
Start with a Nellis purchase sync or a CSV upload, prepare the listing in Lotalyze, then connect eBay to publish and bring actual orders, fees, and sold status back into your inventory.
Sync Nellis purchases
Bring purchased Nellis items into a canonical inventory record with source details, cost basis, status, and a stable SKU.
Upload inventory by CSV
Add inventory from spreadsheets or other sources in bulk. Re-upload the same SKUs to update them without creating duplicates.
Connect eBay
Prepare and publish supported listings, import orders and fees, mark matched inventory sold, and automatically withdraw other connected eBay offers.
For marketplaces without an approved delisting API, Lotalyze creates a seller-action task instead of pretending the listing was removed automatically.
Set the ceiling, sync the purchase, and prepare the eBay sale.
Preview live Nellis listings, then keep the purchase, listing, sale, fees, and profit connected in one inventory record.