I just don't do the niche anymore. When I was a customer of Kole's I was doing a lot with basic house tools -- I sold refubished namebrand stuff that I was getting offline. My tool setup was in a flea market right next to a huge paint dealer (huge for a flea market -- he had ~2000sf of floorspace, bugger than a small retail shop.) He only sold paint, not supplies, so needless to say I had shelves and shelves of rollers, brushes, drop cloths, pans, stirrers etc. I got almost all of that stuff from Kole. It was a golden time, banking off of my neighbour's floor traffic with products that also were relevant to my main product line.
If I ever needed dollar store-type stuff again in any niche, Kole would be one of the first places I checked out.