Maybe I missed it, but I didn't see what I call "deal bragging" (which is very common I believe and that particularly irks me).

Basically everyone (but me) manages to get things (or work done) for much less than their common market value is or however much less than what I can get it at.

Be it a car, a pair of trousers or a phone, or the renovation works of his/her bathroom, the "deal bragger" tells you that he/she found (through his/her network or friends, or internet, or whatever other means) a supplier that sold the item to him/her at an unrealistically discounted price or - say - a plumber that did the work for a fraction of what is normal for that kind of work.