Just listing sure? I would only use a buy it now at one place because you don't want the chance of a purchase at two places, one will not be able to deliver and you can get an account suspended.
If you are looking to auction, NO, only one venue at a time.
Hey,
Sedo offers a non-exclusive marketplace, meaning that you may list your domains on other internet sites.
Should you enter a domain into an auction at Sedo you agree to exclusively list, market, and sell the domain through Sedo and it's affiliated marketplaces until the close of the auction. You must remove the domain from all other sites where it is listed for sale in this instance. You can refer to our Terms of Use for more info. Or if you have any questions feel free to contact us [email protected]
All the best
Chris