AmazonTradeinArbitrage was a tool that I created during summer break in 2015; I later used the project as a substitute for EE396. The project helped me learn about web scraping and creating programs that interact with a database.
The arbitrage finder was implemented in NetBeans, a Java application platform. Within three weeks, I created a command line tool that scraps HTML information from Amazon.com textbook pages, compares the item prices with their trade-in values, then organizing their urls in a mySQL database (using MAMP) sorted by largest positive difference.
In this project, I gained experience with HTML and CSS (for finding relevant information from webpages), myPHPAdmin and SQL for database storage, and writing programs that interact with a database.
Source: AmzTradeinArbitrage