Where to get Prey

You only can get those retail copies and activate on Steam, since it's not available in the Steam store anymore.

Win it like me :D

May be cheaper somewhere else. Don't know!

I had an old boxed copy of Prey from several years back, just activated it on steam after seeing this thread! I had no idea the key was redeemable!

Go to SteamTrades, there are a few guys who can sell/trade one to you :)

Here

There used to be a place that sold Prey keys for 1$ a pop although that seem to have been shut down. I believe most of the guys reselling Prey keys on steamtrades and such get them at 5$ each but I can't remember from where.

Why the hell did you raise this topic.
Spent a couple of hours battling with webmoney, but got me a russian region-locked key for like 2.5$.

The better question is, how to get the multiplayer working again?

Get the game from Amazon, then enter the CD-key in Steam. That's what I did.

SHT7-CADJ-PGSH-2TRA-E6 <--- you find it here

there are many online key-retail shops, like gameplanet (i think that's were i get my copy from).