I get them out the dustbins.
Up until that point, they were both convinced that I walk right into perfumeries and nick them, but tonight when I walked in with an armful of lever arch files in mint condition at 11PM they realised I wasn't joking.
I just happened to see that a dustbin in the high street was overflowing with green ringbinders so I emptied them out and took them home as the St. Patrick's day revellers streamed past. Just to distract attention from the fact I was bin-raiding I put one of the green folders on my head and pretended it was a St Paddy's outfit. I don't think anyone noticed.
Free folders? Now that's what I call a bargain!