The cheapest energy device on the floor at the conference is almost never the cheapest device to own, and experienced owners know to get suspicious precisely when the acquisition price feels like a deal. There's a reason the razor is affordable and the blades are not, and the aesthetic-device industry learned that lesson a long time ago. The platform is the razor. The disposable tip is the blade. And the low sticker price is bait for a multi-year consumable subscription most buyers don't recognize as a subscription until they're a year deep.
This isn't a reason to avoid consumable-based devices. Plenty of them are excellent investments. It's a reason to evaluate them on the only number that matters — fully loaded cost per treatment — instead of the headline that was engineered to disarm you.