I may be way off base here, but I don't see where you're getting the value $FORM{$qid}. In the previous line, you get the value $qid from the split. If I read the question right, that variable holds a quantity that you want to send. So, why not just use the value $qid?
That would make your print line look like:
print MAIL "$description $qid\n\n";

Guildenstern
Negaterd character class uber alles!