Apple's cryptic invitation on Tuesday to an event set for next week triggered another surge in trade-in activity by consumers wanting to unload older iPhones in time to buy the new model.
Some trade-in companies registered spikes on Tuesday that were as high as 300 percent above the week before. Apple issued invitations to reporters, bloggers, and analysts for a Sept. 12 event that day.
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Because the invite features a large number "12" casting a shadow resembling a "5," the expectation is that Apple will roll out a new smartphone called the iPhone 5 next Wednesday.
"News of the Apple event invitation triggered a lot of activity," said Jeff Trachsel, chief marketing officer at NextWorth, one of several companies that buy used smartphones from consumers. "The number of quotes generated compared to the previous week was up 190 percent."
Other companies saw an uptick in trade-in activity.
"Tuesday was a pretty interesting day," said Bob Kalinski, the chief marketing officer of CExchange, an electronics trade-in firm that handles programs from 40 brick-and-mortar retailers, mobile carriers and online sources in the U.S. Among its clients: eBay's Instant Sale, Wal-Mart and Radio Shack. "Immediately after the news, we saw a 300 percent week-over-week jump in the number of people going online to check prices for their current iPhones."
According to Todd Witkemper, a spokesman for online marketplace eBay, quote activity on its Instant Sale website was up 40 percent Tuesday compared to the same day of the previous week.
The upswing had been expected: In previous Apple product launches, the number of consumers retrieving price quotes for their iPhones and iPads has jumped when news hits that the company has set an event date.
Most of the trade-in vendors, however, anticipate an even bigger day next week, when Apple unveils the iPhone 5 and spells out the new model's hardware specifications and price.
They also again noted that trade-in activity this year has remained much brisker than in 2011, when Apple launched the iPhone 4S.
"It is definitely a lot bigger," said Anthony Scarsella, chief gadget officer at Gazelle, who said that quote activity at his company's website was five times that of 2011 during the same period.
During August, eBay's Instant Sales generated 340 percent more used iPhone price quotes than the same month last year.
The stronger interest in selling used iPhones this year -- and an earlier surge in appraisal volume than in 2011 -- has prompted trade-in experts to predict that the iPhone 5 will sell like hotcakes. "This will be the biggest iPhone launch ever for Apple," said Scarsella.
"People are not just waiting for this release," added Dan Brauser, CEO of Usell. "They're waiting for it and thinking about it and pushing rumors along even before the release is officially acknowledged by the company."