I have 3 Macs, but one of them is an Intel, so I will only mention the two that are PowerPCs.
The first one I got was my Power Mac G4 in the summer of 2012. I paid $60 for it. Originally, in the Kijiji ad, it was listed to have an 80GB hard drive, a single 1.25GHz processor and 256MB of RAM, but I actually got it with two 1.25GHz processors, 2GB of RAM and a 120GB hard drive. Still works great.
Then, in the fall of 2012, I got my iMac G3. I paid $30 for it and had to drive an hour and a half across the city to pick it up. It came with 192MB of RAM, the original 6GB hard drive and its 350MHz processor. The hard drive was changed about 4 times and the RAM had its amount changed at least 5 times. The reason to this was I couldn't make up my mind as to what I wanted. When I was finished with that, it had an 80GB hard drive and 512MB of RAM. Unfortunately, the PAV board fried in it, so it doesn't work anymore. As of now, it has no RAM and no hard drive, and I may potentially remove the CD drive.