Normally auction houses require pre-registration and demonstration of payment ability and signing a contract promising to pay. They verify ID by taking credit c

Normally auction houses require pre-registration and demonstration of payment ability and signing a contract promising to pay. They verify ID by taking credit card details. If they're thinking of ducking out on large amounts they're taking a large risk; it's probably worth sending a $500 tab (plus storage charges and administration) to collections ... plus they have your credit card info. Maybe though.