BIOS flash of Quadro FX4800?

Just want to ask, as the title says i have twin Quadro FX4800 and i intend to flash the BIOS to the GTX260 BIOS

is flashing even worth the effort or i just simply use them for CUDA or PhysX on the new desktop?

I do know you will have to use the driver specific for this card, but will the usual Geforce driver even work with the GPU?

These guys are from a very old HP workstation but the desktop died so i salvage them

how much do these still fetch on ebay?