I could certainly use a few more of those myself.

A lot more than we used to, of course, but still not enough.

"Not so strong as those she used of my wife."

A billion won't buy what it used to, of course, but three seems to do just fine.

"This country could certainly use a few more of those."

In the old days, they used to be different, of course, and Banks still wasn't certain which was best.

Confidence, in fact, was just what he himself could have used a bit more of.

But there were the days when they used to of silver.

Using of this name in other countries is very rare.

As above, was can be used instead of were in these examples.