Home » Profitability Calculator - Advanced (Buyer/Seller)

Profitability Calculator - Advanced (Buyer/Seller)

Profitability Calculator — Vault Line
Vault Line Tools

Profitability Calculator

Know your numbers before you list — or before you buy. Toggle modes, set profit targets, factor in every cost, and see your exact margins across all platforms.

Enter 0 or leave blank if free
Optional — shows annualized ROI
Profit tiers to display (select up to 3)
Advanced options ▼
Packaging & supply costs
Materials cost per item (bubble mailer, toploader, sleeve, tape, etc.)
Default $0.50 is typical for a single
Overhead allocation
Divide your monthly fixed costs (Shopify, apps, storage) by expected units to get a per-item overhead charge
Shopify $39 + apps + supplies budget
Grading cost
eBay promoted listings
Additional % added to eBay's effective fee rate (0 = not using promotions)
0%
eBay effective rate: 13.25% + $0.30
After-tax profit
Saved presets & calculation history ▼
Saved Presets
Recent Calculations
Enter your item cost and source platform above to see targets.
Offer evaluator — should I accept this offer? ▼
Enter your list price and an incoming offer to see what it nets after fees — and whether it hits your profit target.
Mercari: 10% + 2.9% + $0.50 · eBay: 13.25% + $0.30 (+ promo if set) · TCGPlayer (L1–4): 13.25% + $0.30 · Whatnot: 10.9% + $0.30
FB Marketplace shipped: 5% all-in (Meta confirmed) · FB Local: 0% (in-person only) · Shopify Basic: 2.9% + $0.30
USPS Retail rates effective April 26, 2026 · Pirateship rates estimated CT zones 2–5 · Grading fees approximate

Your title

Write or copy/past
Sell To Us

Turn Your Collection Into Cash.

We buy singles, sealed product, full collections, Funko Pops, Hot Wheels, and more. Fill out the form below and we'll be in touch within 24–48 hours.

01

Submit Your Info

Fill out the form below with details about your collection. The more info you provide, the faster we can get you an offer.

02

We Review & Respond

Our team will review your submission and reach out within 24–48 hours with questions or an initial offer.

03

Get Paid

Once we agree on a price, we'll arrange pickup, drop-off, or shipping and get you paid fast.

Collection Submission

Tell Us About
Your Collection.

Include the platform name if you have multiple handles.
e Liquid code