If it’s an a1082, I may offer you some cash for it. Seems the faulty power supply was a known issue, which is why so many are for sale second hand without them..
They had a similar problem with one of the time machines. Only required a £6 capacitor replacing. I know it's not for everyone but these can be pretty simple fixes.
I have a 24inch ACD for not much more than the price you'd pay for a PSU your model...