I got a second hand Color LaserJet 4500 5 years ago, it was built Feb 1999 - it's fantastic, the image quality is incredible. It had been abused - I received the duplexer bent in half - but still works great. The downside is that it's similar size to a tank - I wasn't aware of this when I brought it. It does take ages to warm up too. I moved house recently and my friend convinced me to dump it and get a smaller Samsung colour laser printer as I rarely print anything these days, and the output from computer nowadays are so large which mean the printer sometimes take 5 minutes to process print jobs before actually printing. However, a few days ago when I wanted to put it on eBay, I decided to print a test page to show on eBay, the quality convinced me to change my mind and keep it. Just as well, the toner cartridges are $15 each, as opposed to the Samsung printer where a replacement set would cost more than the printer itself.
My point is that not everything after the 4100 is junk, I did think the 4500 was the colour sibling of the 4050. Anyway, the 4500 is older than the 4100?