Need to replace Peplink balance 30

Hi, I´m going to add the 4 adsl connection to my network, thats why I need to replace my Peplink balance 30, my budget is not very big, but many balancers researching I found this http://www.ebay.com/itm/Foundry-Internet-link-aggregator-controller-balancer-/230516543300?pt=US_Load_Balancers&hash=item35abdb4f44 ,but I do not know much about it.. Someone could give me your opinion or recommend me some other.