No. And I tell you this as the wife of a GOOD tattoo artist. I've got a full backpiece and DH is covered, naturally.
It is true that tattoo artists will give you a good deal or sometimes even free work for a good portfolio piece or perhaps at a show where they are looking to win a trophy. In such a case, you have to be on good terms with them and know them well before getting that kind of deal--DH would do it for his friends, or repeat customers he knows well. This is not a deal customarily given to walk-ins, though.
It is currently the slow season for tattoo artists. The busy season is spring/fall/summer, as college students and construction worker types are their main clientele. So you can get great deals in the winter, even from pretty good artists. With enough decent artists giving deals this time of year, I don't see any reason to agree to be tattooed by a crummy artist. I agree with the other poster who said Big Ben was the only one with decent work, the rest were definitely scratchers. If you want a tattoo, you can get a very nice one in the winter for an excellent price, and you'll be better off in the long run. Not everything can be covered up or lasered off.
The apprentices should find their own skin donors, that's part of being an apprentice and it isn't too difficult. If they are not apprentices, then, well...