I'm probably one of the few people on this board that has a 2GB DDR1 memory module.
I'd say, 99.44% of the users here have 1GB modules, or 512Mb modules. (usually in a 2 x 1GB config, 4x512Mb, or 2x512Mb)
I'm not selling any of mine, because, they are registered modules
Now, if you mean 2x1GB, or 4x512, then that's another story, but your post says "2GB DDR1 module" that would indicate 1 quantity, 2gb stick.