Nobody wants their hands to touch someone else's booger and cheeto dust coated peripherals, or vice-versa. There have been some times recently where I'd have paid money (but not much) to test drive computer hardware before buying it, but to some extent you can do that by purchasing from places with a liberal return policy.
Speaking of test drive, I'm in the market for a car and would love to be able to actually test drive some of the contenders without having pushy sales people all over me and in my voicemail for the next 2 months. Opportunity?