Local Secondhand Marketplace
Design a mobile-first marketplace for listing, evaluating, and safely collecting used household goods.
The brief
Understand the problem
Background
Books, furniture, and other used goods require category-specific condition details and trustworthy handoff coordination. A single generic listing form often hides defects and treats high-risk categories as if they were ordinary household items.
User context
Evan wants to sell a used reading chair locally. He needs to disclose a fabric stain, choose a safe pickup arrangement, and avoid sharing his home address with every viewer.
Product problem
Buyers need comparable condition evidence while sellers need low-friction listing, controlled contact, and a reliable transaction record.
Objective
Design category-aware listing, buyer evaluation, protected negotiation, and handoff confirmation for a used furniture sale.
What to design
Define the experience
Required experience
- Create a listing with condition, dimensions, and defects
- Search and inspect a nearby used item
- Make an offer and agree on handoff terms
- Confirm payment and pickup or open a dispute
Screens and states
- Category-aware listing
- Item detail
- Offer conversation
- Handoff confirmation
Core user flow
Follow the critical path
- 01
Evan lists the chair with dimensions and a close-up of the stain
- 02
A buyer filters for chairs that fit a small room
- 03
They agree on a price and public pickup point
- 04
Both confirm the exchange and retain a receipt
Product rules
Requirements and constraints
Requirements
- Adapt condition fields to the selected category
- Keep communication and offers recorded in the service
- Reveal precise pickup details only after agreement
- Separate ordinary goods from vehicles and other regulated categories
Constraints
- Prohibited, recalled, counterfeit, and unsafe items must be blocked
- Seller ratings cannot erase documented condition disputes
- Off-platform payment risk needs clear explanation
Reality check
States worth considering
Finish line
What to deliver
- Four mobile-first screens covering listing through safe handoff
Optional direction
Visual resources
Use these as a starting constraint if you want one. They are not part of the required solution.
Playfair Display & Slabo 27px
Clear interface writing gives people the confidence to understand what changed and decide what to do next.
Playfair Display & Slabo 27px
Clear interface writing gives people the confidence to understand what changed and decide what to do next.