Trick How to Sell Fast

I have some un-useful goods and I need to sell it on line, but very difficult.
No one call me for bargaining or interested in my goods.

I thinks the following could be the problem

1. Media : I'm not using the righ media to promote. This media could be less visitor or may be other factor
2. Search Engine : My product possibly not recognize fast by search engine, or recognise but put at the end of the "search" result.
3. Price : May be also my price is not competitive with the goods condition that I offer?

And may be more  reason why I failed??

If any one can advise, it will great, on how to sell everything fast ONLINE.