It seems to me, that if you have 1 flat-rate job, and the jackrapid saves you about 1-hr of time on that 1 job, it should in essence pay for itself. Everything after that is just gravy. The leviton version doesn't seem that expensive. No clue how much the other jackrapids cost, but can't imagine they are too out of line.
Unless you buy the tool to crimp one jack and never use it again, I'm not sure how much of a waste it is. I'm sure you have other tools you bought for a job that never see the light of day but once every few years.
Besides, for me, any tool that is reasonably priced (or has a high rate of return), that ALSO makes my life significantly easier when I do use it, is worth it. Plus you get to say you have one.