Questions about HP 410x

That's right, the e-bill feature is currently not available for us. Since September, QR invoices have simply been implemented for the time being.

That should work. Many customers use the X variant for black and the colours mostly the A variant, as colour is rarely in demand in the office.

Different suppliers, availability, daily prices, etc.

I assume that digitec bought a certain quantity of this item and the other three and is now selling them again at the corresponding price. It may well be that at the time of purchase the tri-pack was cheaper than the three individual products and now the individual products are cheaper and the tri-packs purchased at that time are still being sold at that price. digitec always shows daily prices, so the prices are often not fixed like in other shops, which can have a positive and negative effect for you as a customer. (and: this item is not handled by digitec's central warehouse ("ready for dispatch from external warehouse"), so perhaps this also plays a role).

The Rainbow Kit is from the manufacturer and the 410X is our self-created kit. However, the contents of both kits are identical, which is why the Rainbow Kit has been removed from our range.

No. However, you can return such products to practically any electronics shop.