$ 300.00 is probably not going to get you a new excaliber or ten point.
I live in Canada so that usually means i will pay about 15-20% more then someone living in the U.S for the same hunting product. Excaliber's least expensive crossbow is called the phoenix and they usually sell new for around $ 550.00 where i live. My Vortex was $ 600.00 keep in mind that is just for the bow by itself by the time you add a 4-5 bolts some broadheads , destringing tool, cocking tool, quiver etc i think i am up at around $ 800.00 to get a hunting ready rig.
If you knock 20% off that if you live somewhere in the U.S you probably need to spend about $ 650.00
or so to go hunting with one, its worth it though for the difference in quality and performance over the other brand's of crossbows.