If you have an old iPad you want to get rid of, you'd better sell it soon.
Apple has an event Tuesday that will likely debut a new iPad which is causing the selling price of the old iPads to fall fast.
Companies like Gazelle
, that buy electronic devices, said they've seen a surge in sales that started when the Apple announced the event last week.
Last year, trade-in values for the iPad dropped 4 percent when Apple announced its latest-generation iPad in October.
When the tablet hit store shelves in November, that trade-in price fell by another 10 percent.