I also now have a CPS 2500 up for trade preferably. I was going to colossus it, but since I don't really plan to keep it since I just prefer soakers like the CPS 1500 .etc I will just wait and colusses a soaker I plan to keep. It has been opened up, with the plastic piece at the end of the plastic that holds the CPS tubing pryed off and loose, however doesn't affect performance. Pump has been sanded to make pumping a bit better. The soaker works however it is not the most powerful 2500 I've seen, but models vary I guess.
So now at the moment I have one Monster XL (2000-01) and one CPS 2500 up.
Soakers I want:
CPS 1500/1700, 2100, 2700, 4100, Monster (2001), Monster X (depends on version) QFD's (Monster & Normal)
Again, if no interest I'll just eBay them soon.