WTB Tre Sirius, Edelrid Zap-O-Mat, or Cassin Logic/Twin (or similar) belay device

Hey Mountain Project, I'm looking to buy some older belay devices for research purposes. These will not get used for anything other than testing by hanging from a tree branch in the yard, in case you were concerned I was gonna go catch somebody taking 50 foot whippers on these vintage devices.

I know the Tre Sirius had some issues with the device wearing out and no longer catching as reliably; that's fine, I'd still like to buy your busted up one probably. Same goes for the Edelrid Zap-O-Mat, I imagine all that plastic might not have fared so well getting used hard outdoors.

I want the Cassin Logic or Twin just out of curiosity! I've been trying a bunch of different belay devices and am really curious how that style of belay device will feel. I don't think it's going to be great, but I'd like to know how not great it was. I'd also buy an Edelweiss THE 9, Salewa 9Spirit, or similar constricting slot belay plate.

Let me know what you've got and how much you'd like for it. I'm not looking for collectible specimens because I'll abuse them mightily in testing :D

Only random ones I'd get rid of are a Cinch (seems to be totally fine) and a ATC Sport (single tube, just kinda wierd). Lemme know if you are interested in either. 

Thanks for the offer Luke, but I'm not looking for either of those at this time (though I do find the single rope tubular belay devices oddly compelling, I don't know why. Maybe they just seen cute)