What others have said is on spot. Just keep in mind the bushings should be considered disposable items. You need to replace periodically. So calculate that cost into your prices if you plan on selling pens. I like the European as it has a classy look. The tenon isn't that hard to learn. Just use inexpensive blanks to start. As for non-disposable tools, I find a good press very helpful. In fact, if you plan to make many pens it is indispensable. BTW, I much prefer the quality of the CS over Penn State. Now we need pics of some of your pens.
"Folks is funny critters."
Think for yourselves and let others enjoy the privilege to do so, too. ~Voltaire