auctioning won't do you much good; collectors are unlikely going to risk millions of dollars (the difference between a real Monet and a fake) on something that an accepted authority says is a fake. Even if they're wrong you'd have trouble selling it on; you'd be betting they'd change their minds, and they mightn't.
It didn't look that much like other Monets I've seen, and for all I know it could well be a forgery. But the evidence in favour of it being real seemed pretty persuasive.
Prof House had a letter in the paper yesterday
http://www.guardian.c...24/monet-in-the-frame