I asked them about transfer fees on a out of state rifle last week here's the response. I thought it was high when I started reading this thread but since 2007 when it started prices on the transfer fee have increased significantly.
We charge a $75 transfer fee on hand guns and a $75 transfer fee on all long guns. This does not include the $25 background check fee (DROS fee) or CA state tax. Let me know if you have any further questions.
Peninsula Guns and Tactical
360 El Camino Real
San Bruno, CA. 94066