I do too. LAst week I found a gap denim jacket which is EXACTLY what I went in the store to look for for 5.00. I couldn't believe it was right in front of my eyes. Today i almost scored. I need a nicer coat for winter when I will be very pregnant and there was a nice Motherhood coat but it was a large and I pretty much need a small. Bummer.
I know it's not technically a thrift store, but EBAY can be awsome. My Mum found 2 pairs of birkenstocks for me. One is a mary jane style, brand new, still in their box. The other is a pair of the 'classic' sandals that were listed as gently used, but show no wear at all! She got both pairs (and shipping) for $37.