It may be difficult to find an assistant depending on whether you are looking for someone to consign the items to or whether you are just looking for someone to use your account and financial information to post your listings. If it is the later you might try looking for a high school or college student looking for part time work.
If you are looking for a consignor that may be more difficult given the tax implications and all the risks of doing so. Even if you do find a consignor they are likely going to want 50+% of the net profit and they may also be required to issue you a 1099-K depending on the total amount of the sales and what the law finally ends up being. You would be better off looking for an estate sale company or a consignment auction house.
