#!/bin/sh
cd /path/to/csvdir

(
        # set $1 = first file, $2 = second, etc.
        set -- *.csv

        # echo $1 $2 $3 ... $N changing space to comma with tr
        echo $* | tr ' ' ','

        # Print the first two lines (title) of first file
        head -n 2 $1

        # Loop through all files in $1, $2, ...
        for FILE
        do
                # Print out every file, ignoring first two lines
                tail "$FILE" -n +3
        done
# Dump the whole mess into the output file.  Don't put it in the
# same directory as the input files!
) > /path/to/output.csv