New
#11
The price was about 800 Indian Rupees, equivalent to $15US.
The pictures look like full-sized electric leaf blowers, but I imagine they're much smaller than that.
They might be safer than canned air: no worries about spraying cold liquid into the PC.
My main concern would be that the air velocity might be too low. A PC duster should have a relative low volume of air at high speed. A nozzle off a high pressure, oil and water free, air compressor would be effective. It might be too effective, and damage some of the more fragile components,