I definitely have a grey one! My PS2 broke, so every now and then I'll pull out the PS1 to play FFVIII and Metal Gear Solid. I used to have FFVII but I unfortunately lost that one.
I have one in a bag with all its accessories somewhere in the house, it's the grey toned one I believe. I still play PS1 games from time to time but I have my slim silver PS2 still set up for those.
I used to own a PSone (Remodel version of the original PlayStation) but decided to sell it due to space constraints. The console and controller were basically new, which is lucky in my case as I got it at a thrift store for $15. I kinda regret getting rid of it, but I now have a PS2 to take it's place as I was really yearning for something with a lot of features to fill the void, but didn't feel like buying a original PS3 w/ backwards compatibility to play all 3 systems. Still looking for a PS3, but it'll have to wait until I can find a job.
I used to have one with about 30 or 40 games, but it ended up getting sold at a yard sale along with all of the games. I recently picked up a replacement one from a local used games store. So far, the only games I have for it are Asteroids, Driver, and Crash Bandicoot Warped.