senan,
What you bought is a product that is sold mainly in retail stores that don't have a music department, like WalMart or Target. It is intended for students and beginners. The manufacturer slapped the name "Gibson" on it because it is a well known brand, and they hope that you will purchase one of their higher end instruments after you move on from this one.
It is NOT a Gibson Les Paul. I would suspect that at the price point that quality control is nonexistent. "B stock" means that the guitar didn't initially meet what little quality control was there, and it was sent back to the factory to be repaired or refurbished.
It is possible to buy a quality B stock guitar. BUT, you have to know what to look for.
I would also suspect by your posts that you are young, and if not, at least impatient. Dude, it's your money. Spend it how you want. If you're happy with the purchase, then that's all that matters, really. I guarantee, however, that you will either a) not be happy with the guitar eventually and b) will not know how to do a proper setup and maintenance. If it doesn't play crappy now, it will in the very near future. Guitars at this price point can have numerous issues that will need attention over time.
YouTube videos are great. I use them all the time to get an idea of what different guitars and amps sound like. However, I also refuse to purchase ANY guitar or amp when I have not put hands on a similar model and tried it out for myself. The reason is that there are a ton of great players out there, and a great player can make any rig sound good, if they know what they're doing. Also, the comment that you read was probably from another beginner, or someone who is trying to sell his own stock of Epochs.
What Rocket and the others here were trying to do was get you to save some money, and point you in the direction of a quality first guitar that will last for a while. Don't be alarmed if the pots are scratchy, the frets aren't level and cut your hands on the side of the neck, the neck is twisted, the action is a mile off the fretboard, the body starts separating, or you have dead frets or buzzing. Those are just some of the things that can go wrong with a poorly constructed guitar.
Just between Robert and Rocket alone you have enough experience to know that this is probably not a good idea. Spudman owns more guitars than some music stores. If those three tell me to pass on a purchase, it ain't gonna happen. Why? because they are all guitarists that gig regularly and have years of experience between them.
There are some good, inexpensive guitars out there that don't cost an arm and a leg to own. Unfortunately, I don't believe you bought one. Good luck with your purchase, and I hope the guitar makes you happy.
Your attitude is immature and snotty at best. It's a shame, because we have young members here that are productive members who also play well for their respective ages. Claiming, as a beginner, to play better than a touring musician is disrespectful and just plain silly.
See ya on the youtubez, dood.