Not an attorney!!  Check the Deleware State Bar.

this Goldman guy's full of it. he has been threatening our company for some time now and my boss has been making payments to the original creditor and keeping him in the loop. he claims she has not been responding to him at all and today sent an email to her and CC'd, apparently, an associate at "rrbeachlgl.com" (his email is just @rrbeach.com) to indicate the legal department should set the case with a local authority. my boss responded to that email with all copied in and got a failure notice for the "rrbeachlgl.com" address and using an online e-mail validity checker reveals that there is no such address for the associate, although his is legitimate.

this guy called me...sounds shady

It's simple. Yes, They are a legitimate collection copy. They have attorney's on staff and do pursue people who don't pay. Pay the bill and they'll stop or ask them to investigate the matter. (They hire auditors to verify your debt)