I've been meaning to make a post about this, so I'm glad somebody else got to it before me. This is the latest in a long line of screw ups from discogs, and if you read the blog/forum posts about it, you'd see that 99%+ of the users are against it. There are way to many factors in shipping to come up with a standard policy that covers them all, and this will be nothing but a major headache with sellers either going to have to raise there postage rates, and stick it to the buyer, or they'll end up having to eat the loss every time the system screws up and only charges $10 shipping for something that ends up costing $25.
Supposedly your items will still show up in the marketplace, but people won't be able to place an order, but with luck they'll be able to contact you direct and you can proceed with the transaction outside of discogs. So, anybody reading this that buys from me off of discogs, just contact me direct in the future, not only will you get a better price, since I no longer have to pay the discogs fees, you won't have to pay the sales tax that discogs automatically charges you either.
The fact that they're still going through with this, despite the mass amounts of negative feedback, and threats of sellers boycotting discogs makes me think there's more to the story they're not telling us, so don't be surprised if in a few months from now you see them announcing the sale of discogs to ebay, or some3 other party.....