Nope, they'll sell them until they run out of stock. You'll buy the
lower denominations for use as make ups to fill the 4¢ void. They only
time I can recall they used an actual 'make-up' stamp was in 1991 for
use with an 'F'(25¢) non demonimated stamp. It said on it "This U.S.
stamp, along with the 25¢ of additional U.S. postage, is equivalent to
the 'F' stamp rate". Its value was 4¢ and was created due to a shortage
of lower demoninated stamps that could equal 4¢, and because I don't
believe they had a newer 4¢ stamp available as they do now.

If they get close to the Jan 06 timeframe and still have not settled on
a rate but are pretty sure an increase will be inevitable then they'll
print another non-denominated stamp and not assign a value to it until
thats settled.

John

Jorg Lueke wrote:

We have unmarked forst class stamps here as well. Though I imagine the
PO probably stops selling them in times just before price increases.