I believe in recycling items rather than buying new thus eBay is a great venue. These apps assist with buying and selling when away from home.
This app gives you access to eBay on your android, a must for buyers and sellers.
This app offers a great tool to assist eBay sellers and buyers in calculating profit, paypal fees and shipping.
Pocket Auctions eBay
This app allows one to bid, search and check myeBay.