Markdown

Repricing software for your inventory on Amazon.

Markdown helps increase your sales by monitoring and automatically updating your inventory prices according to the current market. This saves countless hours of manually re-pricing hundreds, if not thousands, of listings.

Features

Finds the lowest price listing with equivalent or better condition, and either matches or beats the price by $0.01
Calculates profit earned from the listed price after shipping, tax, and Amazon fees
Sets price floor to a desired minimum profit
Sets price ceiling to prevent offer from being delisted (happens when price is too high)
Filters listings based on condition and seller rating

How to Use

Create a text file in the Amazon directory with all of your product ASIN/ISBN-10 numbers and their condition. The condition value corresponds to the following table (see books.txt for an example):

Condition:	Value:
New	9
Used - Like New	8
Used - Very Good	7
Used - Good	6
Used - Acceptable	5
Collectible - Like New	4
Collectible - Very Good	3
Collectible - Good	2
Collectible - Acceptable	1

After running the program, there will be a file inside the Amazon directory titled <FileName>_out.txt. The text file will contain an inventory list of all your products that met your minimum desired profit and their new prices.

For each product, the console (System.out) will display the name, the new price, and the net profit. If there are product(s) that did not meet your minimum desired profit, the console will also display a list of those product names at the end.

Invalid product ASIN or ISBN-10 numbers will be printed to System.out. Problems with network connection will throw an exception to System.err and terminate the program.

Prerequisites

Java JDK 1.7 or higher
For convenience, you should add the /bin directory to the PATH environment variable.
jsoup 1.8.2 or higher
jsoup is a Java library for extracting and manipulating HTML data.

Getting started

Clone the repository and cd into the same directory.
$ git clone http://github.com/rchen8/Amazon.git
$ cd Amazon

Using Eclipse
Select File --> New --> Java Project. Uncheck "Use default location". Under "Location" browse the directory of the Amazon repository. Click "Finish".
To add the external JAR in the lib folder, right-click jsoup-1.8.2.jar and select Build Path --> Add to Build Path.

Using Command Line
cd into the src directory.
$ cd src

To compile with the external JAR execute the following command (replacing <path> with the full file path to the Amazon directory).
$ javac -g -d <path>\lib -cp jsoup-1.8.2.jar Amazon.java

To run (replacing <path> with the full file path to the Amazon directory).
$ java -cp <path>\lib\jsoup-1.8.2.jar;. Amazon

About

Please feel free to contact me if you have any questions or suggestions for improvements. If you're interested in development, fork this repository and submit a pull request. Contributions are welcome with open arms.

TODO

Login to Amazon seller using the Amazon Developer API
Parse the inventory page on Amazon seller to sync price updates
GUI and I/O interfaces
Simple way to add condition filters
Parse tax information from HTML (cssQuery doesn't work on Amazon for tax)
Optimize time to parse listings by only selecting the lowest price per condition
Avoid price wars by counting number of price changes