Printer supply "deals"

So, I ordered some toner cartridges off eBay for the church's new printer. Specifically a bundle containing 2 toner carts and a drum. I got an email this morning containing a one-day-only discount code for 15% off at their website.

I figured "what the heck, we'll use the supplies eventually" and headed to their site. The bundle that I bought from them for $76 shipped on eBay is $135 ("on sale!") at their site, so $115 with the coupon. I think I'll pass.