MegaChess.com sells pretty much just one thing — large chess sets … as in chess sets where the pieces are up to 6 feet tall.
Some of those sets can, not surprisingly, get pretty expensive. On the other hand, depending on the material you’re willing to settle for, you can also get some large chess sets relatively inexpensively.
For example, a chess set featuring plastic figures where the King is 49″ tall can be had for $299 (plus the cost of whatever board you’re going to want — and, yes, they sell those too).