I know I made my first purchases here in 2008... so I'm missing a bit of that from when they switched to XCart.
Total spent: $325.80 ($50 of that was in gift cards I gave to others)
Biggest purchase? $27.67 (just last month)
I am impressed how good I've been, but that's only because: 1) I had gigs with Dani and Zoe for a while and 2) There was like a whole year in there when I didn't scrap AT ALL.
EDIT: Didn't realize I had posted in this thread back then! I added my first total to this one.