I think convertibles cost around $2k at max while priced rounds will start at $20-30k. The $20-30k is not too much money if you are raising over a million but for a $150k round, it is a little bit too much
I had a priced round done (at startup rates, admittedly) by Orrick for a few thousand pounds Sterling – I forget the exact amount, but it was well under £5k – back in '09. They knew it was a loss-leader – lawyers want to build long-term relationships too.