Ive been offered a colour 504 which is cream and brown with the filters on the far right of the head. I have used later model 504's when I had access to the university darkroom, and just wanted to know what the differences were between the old and newer models.
The second link posted shows a DeVere model closer to my 5108 enlarger, and Collectable Camera's price is very good). You might want to try a DeVere supplier for the exact details. From the photos it looks as though the older unit only uses a single 250W bulb so your exposures will probably be longer.
I've got the same as the Collectible link and also one with a Variomat head. Both have switches that cut off the filtration backlight and that also allow you to go unfiltered. Hopefully the one you're looking at has a couple of lens panels and carrier inserts for various formats. AN glass would be a bonus.
Me neither, I found the link you posted to the enlarger they have for sale sometime before I posted this thread.
I asked about the gear and they said that the enlarger looked in good condition but they were unsure of the power supply or the timer as they both looked "ugly". Also the enlarger only came with a 50 and 80mm lens combo, sadly no 150mm.