I have a Enterprise – Economy Space Saver RO System from bulk reef supply. Used very little maybe around 10-15 gallon. comes with both the standard connectors and a Mur-lok RO Pal 1/2" (OD) Pipe x 1/4" Push Connect (no drilling needed).
http://www.bulkreefsupply.com/store/...ro-system.html
$40.00
Half a pail of instant ocean salt. $20.00