The eBay Trading Assistant program provides templates for marketing materials including flyers, business cards, and even scripts for radio commercials. Sign into your TA account and look for the Tool Kit on the left side of the page.
Print off the business cards and keep plenty of them with you at all times. You never know when an opportunity will present itself for you to hand out a business card.
Always enter restaurant giveaways - those bowls they have at the register where you can drop in your business card. Try to get it in there facing out if it is a glass container. Passersby and restaurant employees will see your card.
Post flyers on bulletin boards in high traffic areas. (Always ask before posting a flyer on a bulletin board.) See if you can post them at your gym, church, dry cleaner, Laundromat, library, grocery store, break room at work, or clubhouse. Ask your friends to place them in their break rooms at work and their church.
Promote your business using social media sites such as Twitter and Facebook.
Partner with local businesses. Talk to owners of consignment stores, thrift stores, boutiques, or retail stores and ask them if they have someone selling their merchandise on eBay. You may be able to strike up a deal where you sell their merchandise for a commission.
Also check with your dry cleaner to see what they do with unclaimed items. You may be able to work out a deal where you sell the better unclaimed items for a commission.
Give plenty of cards to connectors and explain your TA business. Connectors are people who know lots of other people and are good networkers. Examples include realtors, teachers, public officials, volunteer workers, receptionists, bank tellers, little league coaches, etc. Think of people you know who come in contact with lots of other people every day, and may see an opportunity to connect you with someone who could use your service.