Sure, load up your data into a hash-based structure (see ARRAY OF HASHES in perldsc).

my @houses;

# populate @houses, an AOH (see perldsc)
foreach my $file(@array) {
   open HOUSE "<$file";
   my $hr={input_file => $file};

   # do whatever parsing you need to fill in the fields
   # this assumes that price, location, etc... are all one
   # line each in file
   $hr->{price} = <HOUSE>;
   chomp $hr->{price};
   $hr->{location} = <HOUSE>;
   chomp $hr->{location};
   #...
   close(HOUSE);

   push @houses, $hr;
}

# sort
@houses=sort {$a->{price} <=> $b->{price}} @houses;

#generate HTML
[download]

Make sense?
--
Mike