Gents:
I don't spend as much time here as I should, but I have a few bpe rifles for sale, including a .500 and a .577.
You can see the .577 on my website <calpappas.com>
On the navigation bar, click on double rifles for sale and the .577 is the first one.
I also have a Powell .500x3". It is not on the site yet.
You can email me at <pappas@mtaonline.net> for any info, photos, etc.
Cheers,
Cal
PS. While I'm at it I also have a nice 8-bore on my site for sale, too. It is placed under the .577. A best quality Jeffery box lock 8, ball and shot gun. Lots of nice double rifle photos on my site. Have a look.