Agreed, searching eBay with
buffalo china cups will give you lots of price performers. I like the old diner cups, they're nicely shaped, retro looking, and a practical volume for cappuccinos / small lattes. The thread
Your favorite cups (demitasse), if you could choose only one set offers suggestions. My favorite practical choice is the thick-walled Nouvo Point:
Several online merchants stock them in brown (e.g., Sweet Marias). Espressoparts.com has a page of them in brown and
white, though I'd call to check on availability. They also stock the La Marzocco cups:
(There was a nice cream colored one like the above with a gold rim that I almost "borrowed" from Counter Culture Coffee's espresso lab; I haven't seen them online.)