Originally posted by Valve:

Today we’re announcing changes to gifts on Steam. The gifting process has had a bunch of friction in it for a while, and we want to make it easier for you to share the games you love with friends. Steam Gifting will now be a system of direct exchange from gift buyer to gift receiver, and we will be retiring the Gift to E-mail and Gift to Inventory options. Here's a quick breakdown of benefits from the new system:

Scheduling Gifts Is Even More Straightforward
Go ahead and buy a gift months in advance and have it delivered to a friend on time, every time.

Declined Gifts Resolve The Way They Should
In the old system, a declined gift would sneak back into the giver's inventory and remain on their bill. Now, if a recipient already has the title, or just doesn't want it, they can click decline and the purchase is refunded directly to the gift giver.

Safe Cross-Country Gifting
No more worrying if a Gift to E-mail or Gift to Inventory is going to work for a friend, gifts sent through the new system will always work on the receiver's account. When there is a large difference in pricing between countries, gifting won't be available and you'll know before purchase.

These changes are now available. Please let us know if you see any issues or have any feedback.

Note: Pre-existing gifts will be unaffected by this change.

source

Sold!
I have one last copy of Interstellar Marines that I will trade for one TF2 or CS:GO key. Your key has to be marketable.

It's a great deal and it will cost you less than it would if you were to buy it from the Store, with or without a discount. The lowest recorded price for the game is $9.49.

Let me know if you're interested.

I will trade 3 copies of Medieval Engineers for 8 TF2 or other keys. Paying with sacks of gems is also an option. Let me know if you're interested.

The game is about building and destroying castles and it's from the creators of Space Engineers. There's no multiplayer mode right now, but it's coming.

I have 2 copies of Interstellar Marines, region free as usual.

I want 1 key + 1 ToD or 5 sacks of gems for one.
Feel free to PM me about this or comment here.

All gifts purchased in Russia and other CIS countries, SE Asia, South America and Turkey are now region locked.