I was in Orlando recently and checked into a store that sells music and movie memorabilia, autographs and that kind of thing. The store is reputable and supposedly has a guarantee on the authenticity of their sales.
I saw a large frame with a white Squire guitar mounted inside. The guitar was signed by all members, and Roger had written "Queen tour, 1984" or something similar under his signature. A sleeve from Jazz was monted as well as a photo of the band taken around the Works era. Looked great, and was priced at $7000
Other items of interest:
Indianna Jones whip for $36000, mounted with H. Fords autograph
William Shatnes shirt from the first Star Trek episode, $35000
and the best, an old bass guitar with the 4 beatle signatures, $75000.
I'll take two