Halcyon never made the Scouts in blue. They've always been black delrin. The one you are looking at on Ebay is the Scoutmaster, and the seller is a decent guy with a good reputation. I've bought from him many times with no problems at all. I trusted him enough to spend more than $1000 with him for a Helios-9.
Halcyon used to use the UK SL4 head (which is what all of the clones use), and there have been a lot of complaints about the rubber coming off of the new in-house design.
FWIW, it's really not a big deal. Just be aware of it and attach it firmly with a dab of Aquaseal.
That said, Scubaroo, Oxycheq, Canadian Extreme, Divelightman, and a few others all make decent clones of the Scout.
None (including Halcyon) are without happy customers, and none (including Halcyon) are without some customers who have complained about something.