Ok, I finally splurged. I've been running around to these second hand stores all over Japan and haven't found anything cheap or purple. I dont have the time to do this once in Canada, so I finally bit the bullet and just ordered exactly what I wanted online. I bought 6 plates. They are purple and vintage!
Now that I've done it, I'm SO SO giddy about my purchases! I absolutely love my cake plates! And I did the cake math (see below) and they'll hold enough cake for everyone. yay!

Of course, I'm going to add a teacups to the bases of the plates and a candlestick or something taller to the 6" plate (top right). Nothing will be done to raise the largest plate (top left).
Here are the 9.5" plates ($5.00 each!):

And one of my favourite purchases of the day was my 3" cup plate circa. 1980s (like me! and FI! lol). I'm going to use this little gem to glue our cake topper to.

Seriously, completey in love with my purchases today. What do you think?