I think most on here will agree, there's no point buying a cheap gearbox.
Once you factor in the time and effort taken to replace the gearbox, (if your not doing this job yourself, its a very expensive one) theres no point putting anything other than a properly recondition box in there.
the 1.4/1.6 transmissions are far from bullet proof. I wouldn't trust a second hand one, which you have no history on, and no idea of its condition, until its too late 
Its for this reason, ive decided in my mind, that if my transmission goes, ive got two options; 1.8T conversion or Break it for spares.
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