Buy Uptrip cards and compare prices on OpenSea

Uptrip is a mobile app for people who fly. Once you have flown with a partner airline, a scan of the boarding pass is enough. The app then puts together a few cards that belong to that trip: the departure and arrival city, the aircraft, the airline that operated it and sometimes a special card. You choose which of them to keep. The cards go into collections, and a complete collection can be redeemed for the reward Uptrip has set for it.

A card stays in the app until you decide otherwise. Connect a crypto wallet and mint it, and the card becomes a Polygon token. From then on its owner can send it to another wallet or offer it for sale on OpenSea. Our guide to the Uptrip NFT explains minting, the contract and what changes for the card.

This site lists the open OpenSea offers, with a page for each city, airline, aircraft and special and the cheapest card at the head of every list. Before you switch to OpenSea, you can compare what each seller asks for a card you still need.

Prices come from the sellers themselves. An owner who wants to part with a card lists it on OpenSea at an asking price, often with an end date; that listing is an offer. Several owners can put up the same card at different prices, and an offer stays open until someone buys, the seller withdraws or the date passes.

Here, each card group gets a table of these offers that gives every card-and-seller pair its own line, ordered by price. The cheapest row is the group's floor price, the least a card of the group costs at this moment. Below it sits a list of recent sales: amounts that changed hands, which can sit above or below what sellers ask today.

The purchase happens on OpenSea. A buy link opens the listing, and you confirm the payment in your wallet. The walkthrough for buying on OpenSea covers each step; the guide to Uptrip card prices shows how to read offers and sales together.

Keep this rule in mind before you pay: a card bought on OpenSea arrives in the Uptrip app as a non-original. The app counts a card as an original when it stems from your own boarding pass. If a collection asks for a minimum number of originals, bought cards cannot fill those places.

Before you spend money on a card, run through these points:

• The Uptrip app has the last word. Whether a collection is still open, what it asks for and how a bought card counts is decided there, so look in the app before you pay.
• Prices move. Between your look at this site and your click, someone else can buy the card or the seller can change or take down the offer, so check the price again on OpenSea before you confirm.
• Fees are charged in addition to the price. The blockchain transaction carries a network fee (gas), and a credit card payment through OpenSea's payment partner carries a processing fee as well.
• There is no way back. Once your wallet has signed, the transaction stays on the blockchain for good.
• We do not give advice. This site shows what is on offer; it rates neither sellers nor cards and does not tell you what to buy.