I missed several T4s on evilBay, so I started watching the FS listing here on APUG. I got a great deal on one with a cosmetic flaw.
Now, on the Bay you absolutely couldn't trust the seller that it is fully functional. But here you know that whoever is selling it at least knows if it works or not. And I still paid less than what I bid and lost on the Bay.
I think it's awesome. I've been very satisfied with it after half a dozen rolls of film.
There is a T4 listed in the classifieds here right now that is very nicely priced.