Hldalis.com and Petra.com are both in the SaleHoo Directory so they should be safe to use. However, upon checking Todayscloseout.com and N1-dropshipper.com, I have found that they have only been online last year (2008). I came across discussions on these two suppliers and I have provided the links below so you can check them out.Link hidden: Login to viewLink hidden: Login to view
That should help you decide whether it's safe to deal with them or not.
We recommend that you deal with suppliers that have been online for more than 2 years. For more smart sourcing tips, please go to Link hidden: Login to view
Hope that helps!