Roger Waters Amused to Death LP what is it worth$

Hi
Have the CD, played it lots when I got back in 93.
When I was at Mike L's place the LP was so stunning that I want to get the LP as well. The LP belonged to Steve Dobbins and it was the first release of the LP.
The problem is that I do not want to buy a fake-bootleg of the original.

Solong, Thanks for great the link. It is a good one.

Thanks for the help.

Was the original LP 33 rpm or was it 45 rpm.
Thanks,

33 1/3 double disc set