Gixen is second to none amongst Sniping services in both quality and value. The owner, Mario - a great guy who I've personally communicated with - is like a modern day Robin Hood in that he could charge much more for his service but instead opts for the "Glory!" God Bless him!
He offers his service for free (1 satellite) and only charges a nominal $6/year for an optional mirror satellite (which insures your bid is logged in the event the transmission to the first satellite is blocked).
I've been more than satisfied for over 10 years and will be a customer for life! Thank you, Mario!