My 2004 17" PowerBook G4. Believe it or not this is still my main laptop and I use it daily : r/mac
Best Buy: Apple® PowerBook® G4 with 17" Display M9970LL/A
Computer Memory and RAM, Memory Stick, Memory Upgrade from Kingston, Crucial, Corsair, Mushkin, and More - Directron.com
1GB RAM Memory for Apple PowerBook G4 M9690LL/A (1.5Ghz 12-inch) Black Diamond Memory Module DDR SO-DIMM 200pin PC2700 333MHz Upgrade System Specific Memory - Newegg.com
My PowerBook G4 12" Journal - Full tear down, SSD upgrade and CPU Fan. | MacRumors Forums
Apple POWERBOOK G4 A1013 Refurbished Laptop 4GB RAM 250GB HDD
Here's a rare look at a 17-inch PowerBook G4 prototype with a beautiful red logic board [Video] - 9to5Mac
MCE 8X DVD±R/RW + DL "SuperDrive" Upgrade for PowerBook G4