A reg flag went up and it is good that you saw it.  No, a collector does not have the right to financial information.  A judgement creditor, however, may indeed have that right when collection on a judgement.  You are not there yet.  Do not let the attorney intimidate you.  Tell him that you can pay x for x long to pay it off.  Tell him that if he continues to threated you - which is a violation of the Fair Debt Collection Practices Act - or continues to act "unethically" by asking for information he is not entitled to you will report him to the bar association in the state in which he is licensed.  Then get a lawyer yourself.  Good luck.