Only reason we use them is convenience, and I can pop out in lunch hour and post small things.
ARB blocks are almost £6 now, TCA bushes over £3 (they weigh almost nothing), a stage 2 subframe via Royal Mail/ Parcel force is almost £45 that's mainland UK. A courier can send one to Portugal for that price!
Worth checking too, as special delivery is sometimes cheaper than first class recorded if you need extra insurance or it's heavy.
What really pisses me off isn't their prices, it's the postman sticking a missed delivery slip through my door without even trying to deliver something- usually because its too heavy for them to carry on a bike... you then have to wait 24hrs to walk 300yds down the road to collect it. Utter piss take, pay for delivery to your house, and end up doing the leg work yourself. Jokers.