+1...and they are reasonably priced...good enough for my race car, good enough for a road car...

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No Subarus currently owned

I'm repping one of the radiators OP linked, been in for close to 5months now and haven't had a single issue. Has done several track days and many of trips down south with no issue. The radiator quality is good as well. For the price it is, it's a decent radiator. (And I'd take a stab to say that a lot of radiators would all come out of the same chinese factory. Just that koyo/mishimoto would have more QA when it comes to them.)

I have had an ebay radiator before also. Sometimes they have trouble fitting, you may need to bend something or cut a hose.

Some people have had no problems with them. Mine started seeping from the welds a bit after a couple of years, but in no way was it going to kill my engine.

Just keep a good eye on it and inspect for leaks regularly. In any case, provided it fits, it will do the job until you can afford something better.

I got a replacement from Perth Radiator Centre
Perth Radiator Centre - Perth's leading supplier of radiators and inter coolers

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168kw & 300nm @ the brochure

Saving money by using a cheap or used radiator-

The cooling capacity will almost certainly be sufficient for any mods. Use WaterWetter as coolant to improve cooling, -it reduces cavitation.
The question is, will it fail?
No coolant does any good after leaking out.

You can take some precautions by checking the reputation of the brand, the condition of the item such as state of welding or damage if any. If you take a chance with a cheapy, keep an eye out for leaks, and above all, carefully monitor coolant temperature. If any doubts, install another temperature gauge.

Use Subaru branded coolant...

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No Subarus currently owned

Is waterwetter bad for head gasket, while subaru coolant has stop leak content in them?

using the Perth-WRX mobile app

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MY08 STI 422whp at 1.5bar on E85, built by Diversion Garage, assembled and tuned by EvoR

Update from new owner: 375whp at 1.4bar on 98, at Tokyo Motorsport

NatRad supply Koyo OEM style replacement for about $260 i think mine was.

Certainly cheaper than genuine and better guarantee than an eBay special