I was in the same boat as you synacksa. Since the PS4 is doing quite well, they really haven't been all that aggressive in their sales or even game bundles.
I decided I'd keep my eyes open on Kijiji to see if I could find a decent used bundle with some games or possibly other accessories. Many (as long as you are in a bigger city) came up for sale with them varying on how good of a deal it actually was. Some people knew what things were worth, and others were just wanting to sell asap. Problem is that the ones that are lower prices go very fast, so you have to be able to jump on it.
I ended up pulling th trigger on a bundle because the dude was leaving the province and needed to offload it. For $375 I got a like-new PS4, an extra controller, a controller charging dock, Battlefield 4, COD: Ghosts, NFS: Rivals, and Killzone: Shadow Fall.
I'm not all that interested in any of the games, but if I can sell them it makes the deal even sweeter.
Overall, it could be a good option. You just have to be fast, and be mindful of the quality that everything is in. Oh and last thing, alot of people will try to sell it "with games" where they will be digital and tied to their account. I know you can still play them if you keep the account on the system, but I actively stayed away from ones with digital games as you may be paying for games that you will not actually own.