Looking for G3 upgrade for 9500

Hello friends,

I'd like to upgrade my 9500 to G3 in order to make it OSX-compatible
(using xpostfacto).

I looked around at ebay - and found, that G3/300-400MHz-cards are payed
at 70-120 EUR/US-$.

Why do people pay so much? - I was offered a blue-white-G3 a few weeks
ago for 320EUR - with 768MB RAM, 30GB hard disk - and beeing a much
faster machine in general than the 9500 could ever be. Stupid enough I
didnt catch the G3.

For my feeling and wallet a G3 upgrade (at around 300MHz) is worth max.
up to 50 EUR/US-$. Does anyone know any source to get an upgrade at that
price?

Thanks and greetings,

Wolf