Well it was twice as much as I was expecting!
I guess you fellas have more money sloshing around than me! Lend me a fiver?
RM, for all their faults, are very competitive for letters/large letters, and generally aren't *that* expensive on most parcel services. For future reference, Tracked 24 is often cheaper than 1st Class Signed For for large letters and parcels, but can't be bought at a Post Office. Tracked 48 is a little cheaper again, but nearer matches 2nd class delivery times.
Special Delivery seems expensive, but does cover a decent amount of insurance, which generally makes it similar to most couriers for more expensive items.
Round these parts, other options as Evri/Herpes and UPS, non of the others have local drop off points*, so not so much choice as more urban areas, if the package really has to be dispatched the same day.
*Actually, now the PO has teamed up with P2G, I think I can use DPD now, and take to PO, as long as purchased through PO/P2G