If you can't find a way to test it, we might be able to do a dual price, "$XX if they don't work, and $XX if they do work" deal. I'm an honest buyer and there are people on here who will vouch for me. I'm pretty sure I've done this with others on here (and the boards DID work and I paid the full price). Let me know if this would be easier for you.
At the moment, I'm not really held up by the boards so I can wait for testing if you'd rather do that.