I think they are being a little hard on you, its a borderline legit question. Not every guy in the gym reads bodybuilding forums on the internet, in fact im sure less than 1% do, so I doubt you are going to run into many people that realize that legit product can come in an unlabeled vial. Ive had arguments with idiots that try and tell me theres no such thing as 300mg deca and that it must be fake, even with the ttokkio label, its frustrating.
Theres nothing wrong with buying a little extra to cut down on the cost of your cycle, or even negate the cost entirely, but what they may being telling you is that if you only have a little leftover that you are trying to get rid of, maybe you shouldnt be selling it to people that doubt your integrity. If you want to sell it, you should be selling it to friends anyway to keep yourself out of trouble and they should know by your results that its legit. Plus you can show them the 100cc jug that it came from and let them watch you use it to fill the 10cc vial that you are selling them. You could also let them read any applicable threads about your supplier on these boards.
If you did decide that you want to label the stuff to resell to people that are a little less familar with you (again, not recommended) you would have to have some design skills with a program such as Photoshop or Illustrator to even come close to making a believable label. If you dont, which Im assuming since you felt the need to post, find someone who does and let him look at another companies label to get an idea for the design. They make glossy labels for inkjet printers in all shapes and sizes. The label on a 10ml bottle of ttokkio boldenon is approx 2 1/8 in. x 1 in. If you cant find a label to fit your desired size you can easily by a bigger label, make the appropriate crop marks in your design and cut it with a $30 paper cutter from Office Depot. Since you are only labeling a couple extra leftover vials you shouldnt have a problem using a manual paper cutter.
Maybe you were tryin to find out if anyone has ever done this and would supply you with the labels or the template that they used. I highly doubt you will find anyone to admit to this on this board or supply you with anything. When someone puts the hours in to design a template they are usually pretty stingy when it comes to giving it away. This goes for all design work, especially that involving the black market.
Another problem with getting anyone to help you is that supplying a template to someone may just be ammunition for that person to make truly conterfeit gear. There would be nothing stopping someone from labeling 10ccs bottles of corn oil and passing them off as legit and no knowledgable person on this board wants to become a party to such a thing. Besides the fact that you would delegitimize their template by associating it with fake gear and waste all the hard work that was put into it. Even if you wouldnt do it, the distribution of their template would no longer be in their control, you could trade it to anyone.
The fact that you would post this question leads me to believe that you really shouldnt do any of this because if you werent smart enough to figure all of this out, then youre probably not smart enough to be selling gear to anyone other than your friends.
Just an opinion