Catalogue to legal invoice. All of it.

• Products, collections, and brands with faceted browsing.
• Layered pricing: a base price list, dedicated price lists for specific customer groups, and time-limited discount campaigns — all resolved by one pricing engine to a single final price.
• Bundles and composite products: a gift set whose stock derives from its components. Reserving or selling the set automatically reflects in each component.

• Serialised stock — track individual items, not just quantities. Essential when every piece is unique.
• Stock reflected accurately across reservations, carts, and orders.

• Guest and account carts, with gifting.
• Reservation holds: for unique items, a customer can hold a piece for a defined window — 48 hours, say — to decide. If payment doesn't complete, the hold releases automatically and the item returns to sale.

• A composable rule engine. A coupon is assembled from conditions: limited to a role, a date range, days of the week, a minimum or maximum order value, a total usage cap, and a per-customer cap.
• New rule types are added through a registry, so an unusual promotion doesn't mean modifying core pricing code.

• Tax zones and tax classes for different goods.
• Customer tax profiles for business and organisational buyers.
• VAT-inclusive pricing where the market requires it.

• Definable zones and methods with composite rate rules — by order value (free above a threshold), weight, volume, or geography.
• Bookable delivery slots with limited capacity, for collection appointments or chosen delivery windows.
• Custom fields captured at the shipping step, such as a precise delivery time chosen by the customer.

• A polymorphic transaction ledger: a transaction may belong to an order, an invoice, or a wallet top-up — all recorded in one place.
• Payment links: for a phone or in-person sale, an operator sends a secure link scoped to that order and that amount.

Card details never reach the system. Payment happens on the gateway's own secure page.

• A double-entry ledger with a computed balance, the ability to hold an amount, and transfers between wallets.

• Complete price breakdown recorded on every order: subtotal, line discounts, coupon discount, order-level discount, tax, shipping, amount payable, amount paid.
• An order timeline recording every status change with its timestamp and the actor responsible, with confirmation steps. The same timeline powers the customer's order tracking page.

• Build and edit orders from the admin panel, using exactly the same pricing, tax, and stock logic as the online store — so the same order can never produce two different totals.
• Free-form lines for a bespoke service or charge that isn't in the catalogue, with an explicit tax class.
• A reservation desk: extend, release, or convert a hold into an order, with no risk of losing the item to someone else mid-conversation.

Operator discretionary discounts are capped, require a mandatory reason, and write a full audit entry — because internal discount abuse is a real risk, not a hypothetical one.

• A complete returns workflow: the customer requests, an operator reviews and decides, accepted goods return to stock, and the refund is issued — each step with a recorded reason and a traceable trail.
• An invoice is an immutable legal document. At the moment of issue, everything — seller identity, buyer identity, line items, tax — is recorded permanently. Years later that invoice shows exactly the same figures, even if the store's settings or tax rates have changed since.
• Credit notes for returns and partial refunds, always referencing the original invoice.
• Gapless numbering for financial documents — the standard auditors and tax authorities require.
• Financial document retention per legal requirement, kept explicitly separate from operational data that may be deleted.

• Membership plans — time-based, quota-based, or both — which can be purchased or granted by an operator.
• Entitlements gating content, media, and downloads: a private gallery only members see, or early access to new products.
• Renewal, expiry, and grace periods handled automatically, with reminders before expiry rather than after.