# Market Monster

> Market Monster is inventory and profit software for online and retail arbitrage resellers who sell on Amazon, Walmart and eBay. It is in early access. Working today: team workspaces and secure sign-in. In development: multi-location inventory, true profit per item, sourcing decisions and orders across marketplaces. Market Monster's planned prices are Standard $29, Pro $99 and Enterprise $299 per month. Every new account starts with a 14-day Pro trial and no credit card. Pricing is not final until launch.

Market Monster is published by Sanford Labs (https://sanfordlabs.io).

## Pages

- [Home](https://marketmonster.io/): Market Monster tracks inventory by location and true profit per item for arbitrage resellers on Amazon, Walmart and eBay. Now in early access.
- [Features](https://marketmonster.io/features): What Market Monster does today and what is in development: multi-location inventory, true profit per item, sourcing, marketplace orders and team roles.
- [Pricing](https://marketmonster.io/pricing): Market Monster pricing: Standard $29, Pro $99 and Enterprise $299 a month. Every account starts with a 14-day Pro trial, no card needed.
- [FAQ](https://marketmonster.io/faq): Answers about Market Monster: who it is for, what works today, marketplace connections, how true profit is calculated, pricing, trials and security.
- [Security](https://marketmonster.io/security): How Market Monster protects accounts: passkeys, authenticator-app two-factor, breached-password checks, account lockout and role-based access.
- [About](https://marketmonster.io/about): Market Monster is built by Sanford Labs, the publisher of a portfolio of software products. Why it exists, who it is for and where it stands today.

## Guides

- [How to Work Out True Profit on an Arbitrage Flip](https://marketmonster.io/guides/true-profit-per-flip): A step-by-step method for calculating real profit, margin and ROI on an Amazon, Walmart or eBay arbitrage sale after every fee and cost.

## Product

- [Get early access](mailto:support@marketmonster.io?subject=Market%20Monster%20early%20access): Email support@marketmonster.io to join early access.
- [Sign in](https://app.marketmonster.io/auth/login): Sign in to an existing workspace.

## Optional

- [Full text for LLMs](https://marketmonster.io/llms-full.txt): Every feature, plan and FAQ answer in one file.
- [Sitemap](https://marketmonster.io/sitemap-index.xml): Machine-readable list of indexable URLs.