Can The ABS Module Be Bench Tested?

For some time I'd been hearing the ABS pump running excessively on my 2004 [186k+] and I finally got the ABS and brake light combination when the pump gave up the ghost. The brakes work, albeit without the anti-lock feature and probably also without traction control. Looked at the YouTube videos on replacing the Pump/Module and it is tedious but doable. Resetting and bleeding will require an additional outlay for computer related stuff.
So here is the question: Can an ABS module be bench tested?
I have 3 alternatives: (1) Go to the local Pick-ur-part yard and get a module from the growing number of Gen II Priuses now filling the yard. It will be guaranteed for 90 days. (2) Buy a used Module online, also guaranteed for 90 days. (3) Buy a new one at some $1300. [My research could not uncover anyone who is remanufacturing these particular modules].
Option 3, new module, is impractical for a 17 year old high mileage car even though the high voltage battery was replaced at some point under warranty.
Option 1, pulling one myself and installing it, bleeding, etc. just to find out if it is good is equally impractical.
The issue is whether I can rely on the hype of EBAY sellers that their "pre-owned" units are good? That would only be true if the unit can be, and is bench tested to determine that it is really good, not just good for a few miles more.
I know the previous owner and they are pretty rabid about proper maintenance. I feel confident in saying that if brake fluid changes were on the schedule, they were done eliminating that as the cause of the module failure. Research led me to contradictory conclusions: Many mechanics claim the unit is not subject to failure. Yet the large number of failures I read about and the number of Gen IIs entering the yards suggests otherwise. This leaves me questioning what I can expect from a used unit, particularly if it cannot be bench tested, or if it can, the test cannot determine how viable the unit is.
All comments and suggestions are appreciated.

 

Sorry if I did not make myself clear. Your answer, however, implies that you did understand perfectly. You posit 2 choices, new or used. I posited a 3rd: remanufactured, but said I could not find one for this car. Your insistence that there are only two options suggests you believe that no one is remanufacturing the unit for this car. My second question was whether there is any way to take a used unit to a specialist and have them bench test to see if it is worth putting in the car. Your answer seems to be, no. The only way to test the unit is to install and hope for the best.

 

Interesting. I have dealt with high pressure accumulators on the Buick Reatta [Teves] and the Cadillac Allante [Bosch] ABS systems, both of which are subject to failure and sported huge repair costs. They have a threaded spherical cylinder with an internal diaphragm that holds the necessary high pressure for the system. However, once you depress the pedal a few times the pressure is released and the accumulator can be unscrewed without danger. This system is apparently different. However I was not thinking of trying to test the module in the yard. I was wondering if there are technicians who can bench test the unit to whom a used unit can be sent. I understand I am going to have to throw money at a used unit in the yard. What I would like to avoid is going through the installation and bleeding process completely blindly. I would feel a lot better if an expert told me the unit tested good before I installed it.

 

Now I am really confused. (1) You mean the unit can be removed from a car, all power and fluid lines disconnected, and still be a missile launcher?
(2) Is the only, or most prominent thing to test for is whether the module will hold pressure? (3) When I look on EBAY, I find remanufactured toyota modules for several models, a few of which are pretty similar to the Prius. Yet there are none for our cars despite what I think would be a pretty substantial demand. Any idea why?

 

True that. They are out of stock. Not sure what Rockauto.com charges for them.
Found another EBAY seller who claims to be selling "remanufactured" or "refurbished" units for under $500. I sent him an email asking what he does to reman or refurb these units. Frankly I doubt I will hear back as I suspect they are really nothing but used units that he's cleaned up. If he has bench tested them, the extra $100 over regular used would be worth it.