Who?
Vintage Stock is a store selling new and old stuff including games, movies (Even on VHS) and more. Some stores are larger and carry stuff others don't. They used to be a great spot to get used games. One of the larger stores by me has hardly no NES, Genesis, 2600 or other old games. But a smaller branch has a ton. If you do decide to check them out if they are in your area, then take the time to look at more than one if you are a collector. Just watch what you get and ask to inspect the disks you get before you pay.
So it sounds like I like them. I do, but look at these examples of what I have received over the last few months. Are they going downhill? Maybe. This is all from the same branch store by the way. I am afraid to bring them all back since there are so many and most (not all) of the staff at this branch acts like they hate the fact you are even talking to them.
Examples
So here are a few images of discs I have received in the last few months. Most are Xbox 360, and some are PlayStation 3.
First is a Mass Effect 3 disc. I only got disc 1, where is 2? Also click on the image to look at it full size. Looks like someone was eating chicken wings while playing!

Games still in the Game Stop wrapper!

At least here they made their own cover. Still not something going in my collection.

Wrong game in the case here. Not even a fake cover on this one for 13 bucks.

Several other games get replacement cases. This one is cracked and missing a chunk out of the top.

Disc Delamination. Wont work at all.

Wow, no fake cover, but someone did cut out a sheet of paper to fit.

Only got disc two of the set here.

Scratched to death. No way this one is playing! Look on the bottom edge in the picture. There is even a notch out of it!

This is just some of what I got. Check your games before you buy! All stores I have been in have a disc surfacing machine. They charge to run a disc through it but if its a light scratching normally they will do it really fast for free to make a sale. If any are delaminated, scratched badly or dirty, feel free to walk away.
Hardware
So I bought a PlayStation 3 from them. It had paint spots on it. Someone must have painted the room it was in. It had sticky spots on it as well. A little scrubbing and it was good.
The Xbox 360 Slim was a different beast. It was dirty too. The fan was dusty but that was expected. But everything was dirty, sticky and overall just needed a good wipe down and some Goo Gone. There was no hard drive, so that means the included Kinect wont work until the software is updated, and you cant update without storage. The firmware was so old on the system it would detect any external hard drive I connected as 32 GB. So I had to order a drive from eBay.
They even included Titanfall with it, and it requires a hard drive! And to top it off, it still has a Game Stop sticker. It had a hard drive when it was traded in there!

Have you had issues with them? Comment in the forums.