You'll want to preface each '\' in YOUR regex with (?<!\\)(?s:\\.)*). Try this code out: 
while (<DATA>) {
  chomp;
  print "matched '$1' in '$_'\n" if /(?<!\\)(?s:\\.)*(\$\d+)/;
}
__DATA__
for the $1th time
SELECT * FROM Product WHERE Price LIKE '\$2.59'
using fore- and back-slashes for emphasis: \\$10/
escaping: \\\$6

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Jeff japhy Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and perl hacker
How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart

In reply to Re: checking interpreted string for escapes versus literal backslashes? by japhy
in thread checking interpreted string for escapes versus literal backslashes? by Anonymous Monk

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