I wish you luck. An unknown brand selling for 1/3 the price of a known brand would have me awfully leery. I suspect it is out of mainland China or India. Me thinks you are letting the low price convince you that you are getting a good deal. I'd still get a $6 dip tube and install it myself and see if that didn't fix the problem. There's no way it's a $200 job. Whoever quoted that was looking for a sucker. It's about a 15 minute job requiring nothing more than a pipe wrench. I guess you're mind is made up, I wish you luck.