I remember when I was a student (so not exactly flush) I bought a vest top from Maxmara which was £80 at the time (c. 1998, so probably in the same ball park as the OP's). Some sort of man made material - I can't remember exactly what.
I wore that vest top to death - it was amazing. It was the perfect weight, draped beautifully and just looked expensive. I have relatively big boobs and a lot of vest tops make me look really busty, but there was something about the width of the straps that was perfect for me. Yes, I could have bought 20 vest tops from Top Shop or H&M for the same money, but this one was perfect for me.
And I'm not a snob about clothes, my second favourite vest top ever was from M&S and was about £10. If you are buying something because you love it and it is perfect, rather than because it is a certain label and cost £££££, and you can afford it, then who cares?