Tradeboss.com is a fraud company. I paid around US$200 for listing of my company. But 2 month has passed, I got no inquiry. Not even on inquiry from this site.
Additionally, they have company directory listing service, but you have to bid for it by its "credit". When you become a premium member, they give you 2000 credits for free. When you want to be a top listing, you have to spend a certain number of credit. When all credits is spent, you have to re-pay for it.
But the listing doesn't help as well.
I was also told everyday I can reach 25 buyers for free. The fact is, they take 1 credit for each contact information review. However, I have reviewed more than 20 contacts and email them. No reply as well!
Never use this site again.