Turbocharger for Mazda Allegro

Hey! I have buyed a Mazda Allegro in Colombia, i think it has the same engine as the Protege

4 cilynders, 16 V- DOHC.
1,6 L
1.598 c.c.
105 HP at 5.500 rpm.

Im now looking for a turbo, i have already searched a lot and I think that the Garrett GT2560R would be the best one..but its too expensive for me..
so i was looking around and found an OBX turbo on ebay. Do you have any experiences with those turbos? I would be able to spent like 200-450 USD just for the turbo...or is it too less to get a good one?
I also found an XS-Power turbo..
how many should i spent to get a good one? and which one?
 
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