I renewed my DDi subscription last month for a full year (yeah, I know: I'm crazy... but I love the DDi tools) and that's been all that I have purchased in 2013, my lowest spend in about 32 years.
Before that I bought a few 4E books in October 2012 to round out my 4E collection... and before that I bought some stuff in 2011 in my usual volumes (minis, PDFs, 4E and other books etc...).
I seem to have reached saturation point and now am enjoying simply getting value out of what I already have (which, let's fact it, is enough to last me a few lifetimes).