SAN JOSE, Calif. -- Federal agents believe a moving company is at the center of a scam that they think started on the Internet and ended up with everything people own being threatened.

Last week, agents went to AY Transport Relocation Services looking for computers, receipts, anything to prove what 200 people say they fell victim to -- a bargain on moving that turned into a bait and switch.

Court documents released Wednesday shows the FBI, the IRS and the Department of Transportation believe this company is up to no good, NBC11's Ethan Harp reported.

According to the documents, agents removed boxes and at least one computer.

Prosecutors accuse the company of giving low-ball estimates for a job, then inflating the price and refusing to deliver belongings unless customers paid the higher price.

"I didn't sleep for three days while I found out everything I could about this company," said Sharon Bayolo, an alleged victim. "I found out I was just a statistic and it was very frustrating."

She and others tell of going to the Web site of a company called National Moving Network, which has since changed names to Patriot Moving. It's known as a moving broker.

Bayolo says the quote that brought an AY moving truck to her home was around $1,300, which was less expensive than the other companies.

But after her things were packed, she was told the weight was 2½ times the original estimate.

"The $1,300 moving quote that National Moving Network gave us ended up with a $4,300 final bill from AY," Bayolo said.

In their search affidavit, agents claim that's a typical tactic of AY moving -- allowing the Web site to quote a low price only to increase it later, Harp said.

Accusing movers of threatening to dump your possessions on the street or take them hostage.

The affidavit accuses AY Transport Relocation Services and National Moving Network of extortion, money laundering, and mail and wire fraud.