I'm new to Salehoo, so I do't know about posting here, however, Liquidation.com is great for dumping merchandise. My partner and I use that site all the time to get rid of left over merchandise from our Event Sales. We get rid of everything. All you need is a camera and your good to go.
Research the type of merchandise you want to sell by putting it into the search option, on the home page. The results will show you others who sell the same type of merchandise and give you a good idea of what it sells for.
Keep in mind there is a fee f 15% or $100 per auction (whichever is greater) of the total sale. The Buyer pays for shipping. Liquidation.com collects payment and arranges shipping for you.
I watched auctions of the type of merchandise we wanted to sell, for 2 weeks, before listing. That is really important. You don't want to put yourself in a losing situation. Watch the numbers closely.
Hope that helped. Good Luck!