Depends how 'silly' they are, a £70 pair of Lindstrom cutters will last 40+ years, and still cut a hair at the tip, cheap (£5) cutters probably need replacing yearly. However, when you lose your cutters (or someone borrows them and never brings them back), it makes the £5 cutters look much more of a bargain
Also, the Lindstrom cutters are far stronger, and will stand much more abuse - you don't try and cut small steel bolts with cheap cutters, and shouldn't with expensive ones either, but at least they will cut through small bolts or steel wires etc.
Personally, while I've still got an old pair of Lindstrom cutters I currently use cheap ones at work, and replace them occasionally.