For GSEC PB from 1M via third party B/D, GS proper I believe is 10M.
MS PB is 5-10M
LEH PB No idea
JPM/BSCPB I believe used to be 1M via third party B/D, 5-10M directly
Just to add one more, directly Pershing Prime 10M.
MER/Broadcort PB account via third party B/D 1M, may be...