By Drew DeSilver
Seattle Times business reporter

More than 7 million illegal immigrants work in the United States. They build houses, pick crops, slaughter cattle, stitch clothes, mow lawns, clean hotel rooms, cook restaurant meals and wash the dishes that come back.

You might assume that the plentiful supply of low-wage illegal workers would translate into significantly lower prices for the goods and services they produce. In fact, their impact on consumer prices — call it the "illegal-worker discount" — is surprisingly small.

The bag of Washington state apples you bought last weekend? Probably a few cents cheaper than it otherwise would have been, economists estimate. That steak dinner at a downtown restaurant? Maybe a buck off. Your new house in Subdivision Estates? Hard to say, but perhaps a few thousand dollars less expensive.