How to Acquire Stamps : Page 146
Supplement this with all different of a single country.
Always buy the largest packet that you can afford inany particular group.
You will, of course, find considerable duplicationwith this method but you will hold such duplication downto a minimum and you will have added a maximumnumber of stamps to your collection at a minimum cost.
Having exhausted the possibilities of all-differentpackets your next advance is to purchase stamps in"sets." Sets are stamps of a single issue put up to sell asa unit. They may be "complete" — every stamp that wasissued of a given series; or they may be "short sets" —just some of the stamps of the series. Because sets involve