while this G4 you have your eye on is a little long in the tooth and slow compared with new Mac's, it will indeed do what you want it to do.
At $50 it is a deal.
I would suggest upping the memory to the maximum, figure will vary with the type of G4 it is. You can get that from crucial.com.
Not sure about the VGA adapter though. If memory serves, all the G4 towers had a VGA connection on the graphic card, but I could be wrong.
Missing manual is not an issue, there really wasn't one, but make sure you get the Operating System disks.
Let us know what you decide
my teen occupies the pc so i took a g3 from my nephew just to access craigslist ebay forums etc .after running a ethernet cable from top floor to where mac is set up i was dissapointed to find os9.2 is not capable to run my email ebay etc.but i got fasinated at the gizmo factor well desighned case etc and love it but to upgrade would cost hundreds .my question is this a g4 is for sale locally,50 bucks its got a monitor included 1440x1050 vga adapter?he's original owner. 500 mhz 512 mb ram 27 gig hd ati rage 128 pro grapiccard says it has a fresh install os 10.4 and no issues. with the mouse and keyboard included.will this get me surfing, pictures, video,everything average person would need?i don't care for gaming,?he says he can't find manual an issue?