Sean,
It's probably worth around $300 - $350 or maybe a little more if it has a Universal folding stock, if you can find a buyer who wants it.
Universals are commercial copies of the military M1carbine and have no collector value, so the value isn't very high.
Currently common military M1 carbines are selling for a little more than $500 and most people prefer them.
Below is a link to a very good web site that will give you a lot of good info and history about your carbine -
Universal Firearms Corp.