A GSX Trade-In alternative for phone repair shops
GSX Trade-In & Buyback is a Shopify app with plans from $59 a month.[1] The STACKS Buyback Widget puts the buyback flow on the website you already have, on Shopify, Wix, WordPress, Squarespace, Weebly or any site that accepts HTML, with drop-off appointments, pickup, shipping labels and Live Price Sheets included.
$49/mo billed monthly ($7 first month), or $29/mo paid annually ($348/yr). No launch fee.
GSX Trade-In vs the STACKS Buyback Widget
Every GSX cell comes from its Shopify App Store listing. Where the listing does not say, we write "Not documented".
| Feature | GSX Trade-In & Buyback | STACKS Buyback Widget |
|---|---|---|
| Price | Starter $59, Pro $129, Scale $249 a month, billed in USD every 30 days. "No per BuyBack or Trade-In fees" is listed on Starter. An annual price is not documented on the listing. [1] | $49/mo billed monthly ($7 first month), or $29/mo paid annually ($348/yr). No launch fee. |
| Where it runs | A Shopify app, installed from the Shopify App Store. "Works with: Shopify Admin, Phonecheck." Other website platforms are not documented on the listing. [1] | Shopify, Wix, WordPress, Squarespace, Weebly and any website that accepts HTML. |
| Appointments and drop-off | Not documented. [1] | Drop-off booking with a date and time, pickup at the seller's address, or a prepaid shipping label, chosen by the seller at checkout. |
| Counter kiosk | Not documented. [1] | Kiosk mode on a tablet at the counter, running the same flow and the same prices as your site. |
| Live Price Sheets equivalent | Starter: "Upload your own buy prices". Pro: "Buy prices maintained from market data". Scale: "Automated repricing". A Google Sheet price source is not documented. [1] | Live Price Sheets, the STACKS Google price sheet service, included with every plan. Buy prices are automated in The STACKS App with live data and custom profit modifiers. |
| Trial | 14-day free trial on each plan. [1] | No free trial. $7 first month on the monthly plan. No contract, cancel anytime. |
When GSX is the right fit
Your store runs on Shopify
GSX installs from the Shopify App Store and lists "Buyback orders in Shopify admin" on every plan.[1]
You test and grade with Phonecheck
The listing offers optional Phonecheck diagnostics to test and grade received devices, then resell them.[1]
You want the back office to reprice and push stock
Pro lists buy prices maintained from market data. Scale adds automated repricing, marketplace push and multi-user access.[1]
If your site is not on Shopify, or you want sellers to book a drop-off time, ask for a pickup or use a counter kiosk inside the same flow, the STACKS Buyback Widget is built for that.
Keep your site. Add the widget.
$49/mo billed monthly ($7 first month), or $29/mo paid annually ($348/yr). No launch fee.
No contract. Cancel anytime. Live Price Sheets included with every plan.
Frequently asked
What is GSX Trade-In & Buyback? +
According to its Shopify App Store listing, it is a Shopify app from WC2 Limited, launched September 2, 2026, that adds a trade-in widget for phones, tablets and watches to a Shopify storefront. Completed trade-ins flow into the GSX back office, with optional Phonecheck diagnostics.
How much does GSX Trade-In & Buyback cost? +
Its Shopify App Store listing shows three plans: Starter at $59 a month, Pro at $129 a month and Scale at $249 a month, billed in USD every 30 days, each with a 14-day free trial. Starter lists no per buyback or trade-in fees.
Does the STACKS Buyback Widget work on Shopify? +
Yes, and on Wix, WordPress, Squarespace and Weebly, and on any other site with an HTML, code or embed block. You paste one snippet, and the install checker confirms it is live.
How much is the STACKS Buyback Widget? +
$49/mo billed monthly ($7 first month), or $29/mo paid annually ($348/yr). No launch fee. No contract. Cancel anytime. Live Price Sheets is included with every plan.
Checked October 4, 2026.
- [1] GSX Trade-In & Buyback on the Shopify App Store (plans, features, developer): https://apps.shopify.com/gsx-trade-in-buyback