Make a list of suitable sites
You should make a list of suitable online auction sites. While making the list, keep in mind that some of these sites offer the guarantee for payment and the condition of products as mentioned in the description. They might charge a little higher price for that but if you look at the broader picture, your interest and payment will be secured. Nevertheless, there are some sites that offer the same services at a much lower rate but they do not take responsibility of either buyer or seller. Instead, their only goal is to take the charges of intermediary services and the rest is the responsibility of buyer and seller. You should take the decision according to your preferences.
Know what you want to do
You should keep asking yourself this question until you are not sure. You should know what you want to buy as you are not here to waste money and wander around. Decide what you want to buy and then look for it on multiple auction sites as this will make your search easier. If you are here to buy, search for the product on all auction sites but if you are here to sell something, then you must post an ad on the website so that it could be viewable for a wider audience.
Make a list
You should make a list of your chosen products or buyers. For example, if you want to buy something, scrutinise the list of sellers but if you are here to sell, make sure your ad is complete and you have published it on suitable sources.
If you are here to buy a product, then you must check the history of seller and if a buyer contacts you through email or contact number, you should give him full description of your product.
Take the decision
After you have analysed, it is time to take the decision. Buy the product you want to buy or sell your product. After selling the product, you must remove your ad.