I'm looking to buy a new gas tank sending unit for my Challenger. I checked out the ones on eBay and the prices vary from $49 to over $100. What is the difference? Will the cheap ones work just like the expensive ones?

Keep in mind you get what you pay for. I bought a less expensive unit that ended up having multiple dead zones through the swing of the float and bad reads on full full/empty. Frustrating as *#x. Read some prev threads and these are the common complaints with the cheaper units. I ended up purchasing a higher cost unit from Dave(rosevillemoparts) at Rosevillemoparts.com. Many tanks later all is perfect. In my books, well worth the xtra $$