We recently added a couple retailers to PCPartPicker:
DTC Online (NZ)
Shopping Express (AU)
One retailer was temporarily been disabled but will be returning very soon:
Then we had a retailer just flat out disappear from the internet without warning:
Best Direct (CA)
We have several more retailers in the queue that should be coming online soon. We're also looking at adding additional countries soon. It's been a long time coming, but long story short we've brought on additional staff to help add new retailers to the site much faster than before. We've spent the last several months investing in infrastructure to be able to add retailers quickly - now we're just beginning to capitalize on that.