I'd give it to you for some keyboard science research / experiments over heavily used ABS keyboard but it's been traded for Model M.
To be honest I don't care about keycaps as they can be replaced easily, even to PBT, but what happens to casing is actually depressing. Next time I'm in the office (probably next year) I'll make a pic of my friend's G80 - it's got very shiny, but he uses it for much longer than i used filco, I think it's something around 5 years and he also programs in perl all day long.
Oh and my office G80 which was used regularly for around a year and for last years it's used only couple days in a month looks much better, only a bit of shine on keycaps, but casing is great. I think it has to be something with a texture of plastic. Cherry and IBM keyboards have a rough surface, Filco is a velvet smooth.