Do you mean buying stuff for school?

I don't spend a penny on stuff for school.

The school pays for them.

 The only thing I buy is sweets, and that's to make my own life a bit easier in terms of discipline: stickers just don't cut it for KS4 classes.

I don't buy stationery or anything else.  I buy the odd book but that's for my use, not students'.

I do buy things for school, from time to time.

About ten years ago, the school I worked in had so little money left in the budget (unexpected cuts in the Council budget, dropping role numbers and trying to avoid redundancies in the staff) we were so hard up that the head teacher bought the photocopier paper out of her own money.  There was nothing in the stock room and I bought my own display paper, pencils, paints etc.  Selfishly, it made it easier to teach how I wanted and it was nice that my classroom could still have nice displays in it etc whereas everywhere else looked a bit dull.

These days I put receipts in to school for things I purchase.  Usually I ask first, sometimes I risk it if it is something I particulary like, that I can find a use for myself on the offchance that school won't pay for it. 

Nothing here either... put all reciepts into office and as a school we buy stickers, praise pads and all other needed items.

If you need it to teach then school should buy it things like stickers, teacher books, reading books, display resources etc etc etc are all part of teaching. Schools expect good progress, learning and behaviour so should provide the tools needed to support this.