v1.4.0
Cross-Listing Oversell Prevention
Real-Time Oversell Prevention & Live-Show Cross-Listing Lock
The biggest release since launch. SellDeck now prevents the #1 reseller nightmare — double-selling the same item across marketplaces and getting your account suspended. Real-time webhooks instead of 10-minute polling, and the only Whatnot-aware show lock on the market.
Cross-Listing Oversell Prevention (Phase 1)
- Auto-delist on sale across eBay, Etsy, and Depop — sub-60-second response
- Server-side webhooks (Stripe, Whatnot) — no PC-on-required polling
- Mercari and Poshmark fallback notifications (no public delist API exists for either)
- Per-item
sold_via and cross_listing_delisted_at audit columns
Live-Show Cross-Listing Lock (Phase 2)
- Manual Lock button on every show detail page
- Auto-pause hook on planned → live status flip (idempotent — no double-fire)
- Per-marketplace pause status badges so sellers know exactly what failed and where
- Manual Unlock with mid-show-sold items skipped automatically
- Etsy uses soft-end + restore via state change; eBay republishes; Depop recreates
Oversell Recovery Inbox (Phase 3)
- Detection within seconds when a double-sale slips through
- One-click resolution: cancel eBay order with buyer notified, mark refund issued, message buyer
- Live-count badge in admin sidebar nav
- Bell + email notifications on every detected incident
- Audit trail and resolution status preserved indefinitely
Multi-Quantity Inventory Sync (Phase 4)
- Quantity propagation across marketplaces on every partial sale
- Auto-delist when stock hits zero (last-unit fan-out)
- Quantity badge on item cards for multi-stock items
- eBay quantity update + Etsy quantity patch jobs
Other Improvements
- Show Optimizer: compare up to 20 past shows side-by-side (Pro plan)
- Real-time sale notifications via WebSocket during live shows
- Buyer Insights with full purchase-history drill-down (Starter plan)
- Schema-drift CI guard — catches latent column references before they reach production
- Annual billing toggle with 17% discount
- 4-marketplace integration: eBay, Etsy, Depop, and Whatnot