Depends what Waterford one is talking about. A set of wine glasses in named patterns brings a decent price. There are always people filling in their sets. Not an investment, but holds a fair value.
A set of 6 Curraghmore on offer at ebay is currently at $US227.50, or $38/stem, with a few days to go. Watching for singles may bring a 'bargain' addition to one's set, but watch out for shipping and insurance.

'Trophy' pieces generate no interest unless for a specific high-ranking national or international event, thus attracting collectors of sporting memorabilia. These items, however, usually are sterling, splashy and engraved with the event winner and data.