I don't like Sedoparking since they don't offer feedback form and all domain sales are through Sedo. With Parked.com I'm contacted directly by domain end users and can negotiate with them even if they deny my counter offers and use Sedo escrow which has much lower fees.
Most parking companies (including Parked) the For Sale link is optional.
I realize you are using Sedoparking not for the parking, but for the For Sale link. Because you have to be out of your mind to use Sedo for parking. They pay peanuts per click, and only for the 1st click. It's outrageous.
Best Google Feeds are Bodis and Voodoo, and DomainSponsor (which uses both Bing & Google feeds).
At Voodoo you can specify a url for the For Sale Link, so you could point that to your Domains Sedo Page. They are proving to be competition to the once best Google feed, Bodis.