Ananias got a bunch of Macs with Quadros and wants to know if they're worth anything. Leo says he can go to EveryMac.com to see their history. But they run a PowerPC chip, and as such, aren't really supported in the modern computing world. Likely, they just fodder for eCycling. However, it is still worth checking out eBay to see if there are any opportunities.
Joy is trying to reset the password on her old Mac and she's having issues. She googled putting code into the Terminal and it messed things up. She found the original disk, but because it's so old, it automatically goes to the dial up modem when attempting to connect to the internet. Leo recommends going into recovery mode by holding down CMD + R while booting up. In the Utilities menu of the installer, there is a reset password tool. She keeps running into problems connecting to the internet, though. Leo suggests plugging the Mac directly into the router via ethernet and rebooting.
Al bought an old iMac G4 and wants to know if he can upgrade the software to Leopard. Leo says that the G4 is about 15 years old, and it may not support it because it's the old PowerPC chip. Leo recommends checking out EveryMac.com. He can look it up by serial number and it will tell him what software it can run. It's probably not going to be OS X.