TP = Shower of shite.
A School I used to work in had a TP opposite the entrance. We had an account, and as a DT teacher I’d occasionally pop in for some bits needed for projects.
I thought they were overcharging me, so I compared notes with my technician. Turned out that even though we had an account and they knew I worked at the school they would always give him about 20% more discount than me.
In the end I opened an account with a different supplier about 5 miles away, and we ordered from them. Free delivery too. Probably spent about 2k a year on materials.