Yeah, I got some rolls of overpriced ($50 per friggin roll!) Alpha Wire I bought a while ago and wanted to top it off with a couple more colours. That was before it occured to me that Digikey ripped you off on wire (Mouser is $30, but that's still expensive). But I'm fighting the OCD urge to get more Alpha wire because it's the same brand, and I tend liking...nay...needing things to be the same brand. I could get 10 colours at the cheaper price for the price of two rolls of Alpha wire.
EDIT: It never even occured to me to check at my local electronics shop for wire since they are almost overpriced on everything...but their wire is cheaper than Mouser's too (same brand).