Two online stores I've come across recently with items I like are High Street Market and Plastica. It may seem like the two styles are completely different, but sticking to one style only can be stuffy or kitschy. Mixing it up can provide good doses of both worlds. Sticking to one color palette (brasses, for example) also produces this stuffy and stagnant feel. Adding splashes of color can loosen it up and let a space feel more lived in.
Clockwise - Gold Feather Mirror, 1960s Paul McCobb Credenza, Spencer Marble Side Table, Vintage Brass Basset Hound, 1909 Antique Globe,
See Plastica next...
Clockwise - Stockholm Savanne Rug, Themis Trio Mobile, Sarna Tray, Egg Bird House