The main way to sell your stuff is when you have good ratings.
To get your ratings, either sell your own home stuff or buy some items.
By selling, you are appealing to an audience that might be interested what you've got e.g. collectables.
By buying, you are not being discouraged by other users as you are not selling but by buying a few things, you will have good ratings.
When selling, the main thing important is go with the flow. Sell items that are popular. By doing that, you are relying on other peoples advertising to draw you to your product. This doesn't always work but usually does.
IMPORTANT: MAKE SURE YOUR PRODUCT IS 100% LEGITIMATE