I haven't used Salvageexporter.com myself but I did a quick check on them and here's what I've found:
Their website was registered in 1999.
The address the domain has been registered with matches the one listed on their website.
Their contact email is at their own domain name.
These are all great, perhaps my only reservation is that according to their website, they only accept cash, cashier's checks, money orders or bank wire transfers. Although it's reasonably common practice among liquidators to accept these payment methods, I'd be very cautious. Because unless you have an established relationship with the supplier, paying with these methods means that in the event of something going wrong, you may LOSE your money.
Try to purchase a sample before bulk ordering to ensure that their products meet your expectations and at the same time, to see how they are to work with and whether they are good value for your money.