The prices of both keep going up, and the folks with enough lettuce to buy them don't seem to mind.

Thus the price of oil kept rising into the 2010s.

Instead, they think the prices of houses will just keep rising.

The food and reasonable prices keep the crowds coming back.

The ones that come by sea- they're hard to get, and the prices keep going up.

How long can house prices keep going up and up?

That much storage will cost a bit more than $500, but prices keep falling.

But in two years, the prices of the town houses kept going up and the couple had not seen another home they liked.

All this time the price of oil kept making new highs.

"The price of having an old car keeps going up," she said, and explained.