1) Sell Used Cell Phones on ebay
The demands for used cell phones with brand names like Nokia, Motorola, Kyocera, Alltel, Ericsson, Sprint, etc in ebay are pretty high. Many of the used cell phones auctions in ebay usually attract bids.

So how to find used cell phones to profit on ebay?
Many people change their cell phones every year. If you are one of them, probably you already have 2 or 3 used cell phones kept at home that can sell on ebay. Your friends may also keep a few of old phones left unused. You can buy from them and resell on ebay.

To get a consistent supply of cell phones, you may think about placing classified ads in newspaper states that you pay money for used cell phone. You shouldn't pay much when buying used cell phones. Do a little research on ebay to find out how much used cell phones are generally selling. If a used cell phone sell at a price of $50 in ebay, you should pay not more than 30% of the price to buy it. If the phone is a recent model you can pay little more and cut a little if it is old and nothing special.

2) Sell Used How-to Books
Used how-to books are quite easy to find and inexpensive to buy. They can be bought at $1.00 or less. You can buy how-to books from thrift shops, estate sales, used book stores, yard sales, etc and sell them in ebay for high profit margin. You can also get how-to books from Book Sale Finder. Here are the type of books you should look for:

Hobbies
Photography, blacksmithing, clock building & repair, woodworking, magic, treasure hunting, iron work, pipe smoking, dog training, antiques, coins, buttons, medals, drawing, painting, craft making, dolls, pottery, etc.

Home and Garden
Home decorating, home remodelling, garden trellis, etc.

Misc
How to repair (watch repair, door repair, pipe repair), how to play, lost treasure, eary aviation, etc.

When you list your books in ebay, you can either list them in the "Book" category of ebay or in the subject specific category of ebay. For instance, If you are selling a book related to home decorating, you may be making more profit if you list the book under the "Home Deco" within the "Home & Garden" category of ebay campare to listing the book under "Book"

3) Sell Gift Cards
Gift card is another profitable market in ebay. There are many people possess gift cards but not everyone of them will use their gift cards. If you can offer to buy these unused gift cards for a price at 20% or less of the value of the gift certificates, they will sell to you. You can advertise your offer in local newspaper, penny shop and trading post. You are looking for gift cards that are still valid (not yet expire). Most gift cards have a toll-free number on the back you can dial to check whether the cards are still valid.

When determining the buy and sell price of a gift card, you should do some research on ebay. Try to look for auction that sell the similar card. See how much the card sells in the auction and set you buying price at 40% to 50% of the selling price of the auction. The starting bid and winning bid of the auction can also give you an idea on how much your card can sell on ebay.