Most expensive shoes I have ever bought, better last 5 years.
It depends what you're going to do in them.
I have to walk about 1.5 miles a day on my commute, and I'd go through a flimsy pair of shoes like that in less than 6 months (ie. new heels definitely, probably new soles too).
If you just wear them in the office, they'll last 10+ years.