If you are still interested in projectors, try thrift stores first. That way you can test them yourself. If you buy one from fleabay, shipping should run around $40 alone. Make sure the seller would double box it. AND make sure the seller tests all functions and that it works perfect. EIKI's & B&H's still have parts available here and there ELMO's are very hard to replace parts. Clean them after every film you run! Clean your film too! :-) You can spend $50 for a 16mm to a couple of thousand. It really depends on what YOU want. Slot or channel loads are the best for beginners.
It is a VERY expensive hobby. I have a LOT of $$$ tied up into projectors, films, & negatives for intermissions. Digital projectors cost more up front, but DVD's are MUCH cheaper than films.