In your Listings - in the Edit Listing journey, on the Set Rights page - you will see a setting to make your lising "FAST Enabled"
By accepting this, your listing will be available for FAST bundle deals in the Vuulr marketplace (potentially in a bundle alongside other Sellers*). This increases the chance of a sale as it unlocks this modern-day category of Buyer.
It also places an eye-catching orange 'FAST-enabled' banner on your listing in the Buyers' view.
Note that (FAST) bundle offers can only be accepted or rejected (because of the complexity of a multi-seller deal); you cannot counter-offer on any offered terms.
However, if you think there’s still a chance of a negotiated deal, you can always propose that the Buyer unbundle your titles from the bundle, and sends a new separate Offer.
* Other Sellers cannot see your negotiations with the Buyer. Everyone is protected.