Thanks for your continued feedback, you guys.
To be fair, despite using inkjet myself, it is ideal that someone uses a laser printer (I assume Xerox copies are) to keep costs extremely low.
But for those of you wondering about cost vs. buying targets... An average page printed with black ink only (how I intend to print these targets most of the time) will cost about 5 cents a page, give or take. Now consider the brick of paper. $5 for "average" grade stuff, 500 sheets.
Essentially, you've just printed 100 targets for $6. Sure, they may be smaller, but looking at the price of commercial targets, and how many you got out of printing your own, I still feel that with an inkjet printer, it's a pretty good deal. And of course, no ordering/waiting online, no shipping costs, etc. In my experience, I've been gouged pretty often for targets in my LGS's, but your mileage may certainly vary.
If you guys are wondering which targets I'm talking about in particular, I'm talking about those Champion diamond sight-in targets. Which I love. But quality and cost-wise, I'd rather print my own diamond sight-in targets.