caveat emptor

Literally, "buyer beware," the principle that it is the buyer's responsibility to be sure that they are not being cheated, overcharged, or given faulty goods. In no place is the adage "caveat emptor" truer than when buying something off an online classifieds ad. It's no one's fault but your own if you paid good money for a dud of a car. Caveat emptor! I can ask whatever price I want for this old camera. Caveat emptor, am I right?

caveat lector

Latin for "Let the reader beware," meaning that it is the reader's responsibility to be sure that they are not being cheated or otherwise deceived. Caveat lector! Read the contract so you don't sign anything you'll regret later! In no place is the adage "caveat lector" truer than when perusing the online classifieds ads for items to buy. I don't trust any of these big financial companies. Caveat lector always applies to their credit card offers, if you ask me.