Go to flcdatacenter.com and go to FLC wage search wizard. Fill in location and job occupation and look for Level 2 wage. It will show you approximate prevailing wage that the lawyer gets from department of labor. Depending on location, it might range from 65k to over 80k.
Even if ur current salary is less than the prevailing wage under EB2, ur employer can still file under EB2 as long as ur company is making profit and prove that it can pay you after u get ur GC, it's up to ur company.