Readers looking to sell their current iPad to help pay for one Apple's forthcoming 2015 iPads can begin locking in price quotes — with an exclusive $20 bonus — over at Gazelle ahead of Thursday's event to maximize the amount of cash they will receive.

The industry-leading electronics buyback service and AppleInsider sponsor is currently paying up to $335 for WiFi iPad Airs, up to $355 for WiFi+ Cellular iPad Airs, up to $295 for WIFI iPad minis with Retina display, up $305 for WiFi+Cellular iPad minis with Retina display, up to $230 for iPad 4s, up to $150 for iPad 3s, and up to $120 for iPad 2s. However, AppleInsider readers who use this link (or any of the links in this article), will receive an additional $20 cash bonus on top of the payouts Gazelle usually pays on any working iPad trade-in valued at over $75. Additionally, the service is still paying up to $275 for old iPhones, though these payouts have been falling around $10 per week, as is expected to be the case with iPad payouts following the introduction of new iPads.

Current iPad Cash Payouts

Gazelle, which says iPad Air and iPad mini trade-in requests fueled a 400% increase in price locks immediately after Apple issued invitations for Thursdays iPad event, has gone to great lengths to make the trade-in process as painless as possible for consumers.

How it Works

To begin, you first lock in your trade-in price by visiting Gazelle's website, where you will be asked to assess the physical and operational condition of your device by rating it in one of three tiers — Â broken, good, or flawless. The ratings include factors like whether the device's screen is cracked or if it has ever been damaged by liquids. You can see a list of current maximum payouts for iPads in the table below or in our Trade-in Payout Guide.

A few days after locking in your price quote, a pre-paid shipping box will show up on your doorstep. Gazelle gives a generous 30 day grace period from the time you lock in your trade in offer to the time you need to pack the device — and only the device — securely in the box and drop it in the mail. Alternatively, you can use your own shipping box and simply print and affix a pre-paid shipping label from Gazelle's website.

Unlike some of its competitors, Gazelle handles all trade-in inspections itself, doesn't nitpick over the trade-in value of devices that arrive in good working order, and will even completely wipe your device of data before passing it along to its new owner.

Once Gazelle receives your old handset or tablet, the company will issue a check within 10 business days as long as the device's condition matches your online assessment. Alternatively, you can choose to be paid more quickly via PayPal, receive an 5 percent bonus by accepting payment in the form of an Amazon Gift Card, or donate the proceeds entirely to charity.

You can read more about how the service works, or check out a list of the company's maximum current iPad and iPhone trade-in prices in our Trade-In Payout Guide.