Aside from whether the cost is justified, I can tell you that http://www.hamrepair.com/
did me right with my TS-440, consistent with his 5.0/5 in Reviews. I looked at it from the point of view that:
I had the radio, in good physical condition, but for the fault that made it useless except as a receiver.
As it sat, it was free. I paid for it a long time before, and it had repaid the purchase price already.
I could toss it or sell it for a song for parts.
Or I could have it fixed up to factory specs for considerably less than I could buy a 440 claiming to be in good working order.
I got it back repaired and gone through thoroughly and a few other, more subtle issues fixed.
So it wasn't a matter of putting more money into it. It was a matter of getting a good working radio for the repair price, which was real reasonable for the amount of work done. If someone came up and offered me a guaranteed in top working order 440 for what I paid to repair, I'd jump on it. I'll grant you there's a modest market price differential between the 430 and 440. But if I paid the same to have a 430 fixed up, I'd figure I got it for maybe a bit more than half price.
Of course, I'm kind of sucker for not throwing out good old equipment, just because it costs a bit to put it back working. I'm willing to pay an hour of bench time and shipping for an estimate to give an old radio a chance and see what they'll knock off the estimate fee, if I don't want to pay that much and let them keep it for parts.