xsh is kinda hard to learn but this does it :)

$ xsh -q < table.xsh

/body/table

,Date,Price,Comments
dkfjskdjfskfd,21/9,2324,abc
dkfjskdjfskfd1,21/9,2324,abasdasc
dkfjskdjfskfdsdfsdf2,21/9,2324,absadsadsc



$ cat table.xsh
open "table.html";
for //table {
    echo;
    pwd;
    echo;
    for ./tr {
        my $first = @onclcick;
        $first ||="";
        echo xsh:join(",", $first, ./td );
    };
    echo;
};
echo;
[download]

Naturally it doesn't handle rowspan/colspan or tbodys