I sell a lot of Macs on eBay and have come across a lot of other sellers posting WinTel equivalents to PowerPC speeds. The problem is there is no correlation with one seller to the next and it seems as though they are just choosing an arbitrary number. I really would like to add this information to my listings with accurate benchmarks supporting this data. There are many people who have not used Mac previously that see 500Mhz PowerPC G3 and think of how slow their Celeron 500Mhz desktop is; so this information could be very useful. Are there any resources that the MacRumor's community can direct me to?