I used to sell lots of jackets and clocks on e-bay, the best days to end your auction is Sunday and Monday nights at 10:30 EST. This is when you get the east coast and most of the west coast. And these have been my best days ever. Sundays people are getting ready for work and just surfing, Monday people finish their days and are to tired to go out, so they surf.
Haven't done much with the domains on E-Bay. I always feel it's a great place to buy, but you get beat up when you're a seller. Everyone waits until the last minute to bid, and I feel you have no options when you list there. Any way good luck with E-Bay, I might try an auction for some of my Domains, but there has to be a better way.