Step Parent Adoption - Deceased Parent

My Step Son lost his birth mother at 11 weeks and my husband has decided it best that I adopt him now that we are recently married. Given the birth mother is deceased, I am reading that this should be very cut and dry, however the Attorney is stating it is $1500 - $2000 to process! I have looked at some of the online options such as reliableadoption.com and dependableadoption.com, has anyone used these or are they scams? I realize given the rules of the forum, this may need to be answered in a private message. Thanks!