I'd park my domains on Voodoo.com to start with. When I become more experienced, I'd park them on Above.com and share them between Voodoo/DomainSponsor/ParkingCrew.
For listing, I'd list my domains on GoDaddy, Sedo, and Afternic. Although I usually list with Make Offer, You could list all 3 with Buy Now. You just have to be very quick in removing any sold domains from the venues where they didn't sell. Which is why I personally prefer Make Offer listings.