If you're in the market for a new iPad, plenty of retailers and buyer sites are more than willing to take your old iOS device off your hands. According to at least two trade-in sites, the number of iPads sent in for trade has soared, thanks in no small part to yesterday's announcements.

Speaking to MarketWatch, both Gazelle and NextWorth have reported a sharp increase in the number of iPad trade-ins over the past couple days. Gazelle said around 140,000 devices were offer to the company on Tuesday alone; an increase of over 700-percent since Monday.

NextWorth, another major buyer of used iOS devices, reported an increase of iPad units over 1000-percent. While the jump in trade-ins is obviously massive, NextWorth declined to state just how many units were involved in the surge.

Perhaps even more interesting, Gazelle and NextWorth attribute 70-percent of the devices sold to the companies as third-gen iPads. According to a Gazelle representative, Anthony Scarsella, the high volume is attributed to the going price for Apple's now-discontinued device.

"Consumers can fetch up to $495 for an old iPad," Scarsella told MarketWatch.

On Tuesday, Apple not only revealed the long-rumored iPad Mini for a starting price of $329, but also announced a fourth-gen iPad. The last iPad -- only seven months on the market -- has already been put out to pasture.

While there's certainly some portion of people trading-in third-gen iPads to upgrade to the new fourth-gen device, it seems fairly obvious the iPad mini is driving the boom. The lower price of the smaller iPad means trade-ins could potentially put money back into the pocket of a seller -- and they still get an iPad.

If you're thinking about grabbing your own iPad mini, be sure to take a look at our handy guide.

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