Ckmac.com has an excellent folded copy for $39 - I'd go for that.
That said, I doubt Bradburied's copy is fake if the GAU logo is clear & sharp and it really is 27x41. If you really want a rolled copy and you can't find it elsewhere, you should get it and check it out. He does offer a 7 day return, so your money is not really at risk.
I looked through his $100+ posters and the only "undisclosed" one sheet fake I spotted is the Scarface. He does disclose that his Star Wars posters are "possibly illegal." I definitely would avoid his inserts.
He definitely has some rarer rolled posters. I think I got a Tarzan rolled poster from him a while back, which has the clear/sharp GAU logo and is the right size.