I take it you didn't test drive this car before you bought it? You should
ALWAYS  have your mechanic check a car before you buy it. Believe it or not
he will quickly spot hidden problems such as a missing tranny.

When you say "no tranny", do you mean the transmission is actually
missing, or that it is there but it died soon after you bought it?

Would it help you to find the seller?  What sort of agreement did you have
with him
or her that would support your position.

You can sell the car to a junkyard, maybe for a few hundred dollars, or you
can
probably find someone who will install a junkyard tranny for you.

What is the car, what did you pay, how much do you want it?

   To answer your question, yes you can trade it in to a dealer.  I've
traded for many with bad tranny's, bad engines, bad differentials, wrecked,
etc.  Anything is worth something!!!  Often, new car dealers are more than
happy when someone comes in with a broken' car--they feel sure they'll make
a sale.  Plus, they can inflate prices of theirs AND yours to make it appear
to the financing organization that you are making a bigger down payment.
   As others have said, I'm sorry you got hooked!  And please remember that
tip about paying a competent mechanic to inspect a prospective car--I used
to be happy to do just that, plus the money I was paid was much easier than
spinning wrenches.  Even worth more than the money was knowing you may have
helped someone with your experience.  s

You can trade or sell anything, all you need to do is find a willing
buyer.  The real question is what you will get for the car, which is
not very much.

Next time have the car checked out by a mechanic and insist on seeing
maintenace records.