Cheap CPE for PTMP

Hi everybody .
Currently i am using Ubiquiti for wireless Radio and Mikrotik for PPPOE authentication .
on the client side i am using MT-LINK AP ( which is fully supported MCS0-MCS15 ) .
i m using the MT-LINK AP in Client Mode . ( which is support Real throughput ) .
the cost is MT-LINK AP is only 15$ .
I want to confirm that is there any Cheapest client CPE available which is fully supported with mikrotik R52Hn
thanks in advance .