Choose 6,1 for Mailings + Rpts.
Choose Total Purchases of $500 and up
Choose No to fine tune
Choose Yes to recalculate
Choose for Last Purchase date from 01/01/1980 to 12/31/2002
Choose Begin purchase report
(Then change to Print and choose Begin again if needed)
Note that the last purchase date isn't 100% foolproof (e.g. even clearing out an old layaway might update that date) However, for the most part this report will give you the right results.