I have been on the lookout for mirrors to use under my centerpieces (floating candles). They are typically andywhere from $2-$5 when you buy the mirrors that are made for that. Someone suggested that I look for mirror tiles at a home improvement store. I found them 6 for $9 at Lowe's today and they were a foot square, which is bigger than the craft ones and will actually look better on the tables at our venue.
I thought I'd pass that info along in case anyone else needs mirrors.