Unless you're willing to sit on this whole bundle for months if not years for a sale, you're definitely dreaming if you think someone newly UKARA-registered will want to drop £3,500 on everything in this listing. What are the chances that anyone would want even 80% of everything listed without wanting to resell the remainder?
Surely breaking this listing down into smaller gun + case/bag + mag pouch + battery, eye/facepro, tactical, grenade and accessory bundles will see it sell more quickly?
I get the seller has sunk a massive cost into something he hasn't got much time on the field for but bloody hell, I don't think dropping the inflexible atttiude and the expectation of timewasters would hurt.