> The only real example I can think of is buying a car, and even then, that's not that likely, that you'll use cash. Consider foreclosure auctions, estate sale

> The only real example I can think of is buying a car, and even then, that's not that likely, that you'll use cash. Consider foreclosure auctions, estate sales, contractor services, to name a few: all venues in which $10K+ transactions are quite common, and cash is a preferred--sometimes only--acceptable method of payment. Just yesterday while securing the services of a flooring contractor, I was extended a 5% discount option if I paid in cash upon final completion; the alternative was a credit card payment online after being digitally invoiced. Not only would the contractor save on transaction fees, but the operational risk of not being paid and legal costs of following through with a construction lien can be quite painful, especially for small businesses.