Want a shinken that'll stay intact during cutting, when that time comes, and not have the blade fly off and skewer anyone observing, as I've heard that can happen. Otherwise, want to save money, lively frugally.
I know when I buy I'll be consulting with my instructor, but for now, I'm curious.
Do you just want to cut stuff or are you really intetrested in a bit more than that?
For reference: http://www.shinyokai.com/Essays_TameshigiriReigi.htm
Much like traditional Christians sequested away in a closet so as to be unperturbed by outside influences may be the best approach.
Where some see spiritual mumbo jumbo others see the meat of the method.