Best value pen kit i've found, thanks to
@TonyL , is the Professor (also called Exemplar). It's a quality Dayacom kit with sturdy components and simple platings that hold up very well. Can still be bought in the $10 range, single tube, and the finished wall thickness of the blank is very friendly. That said--the slimlines are a great place to hone turning skills. Thin skins and really sensitive to getting the barrels finished to match components, especially at the nib. Makes my skills better every time i turn one.
earl