Carl,
If you send them to Razz Marine in Fort Lauderdale, they are cheaper. In fact, you can just take your old one in and swap it out for a remanufactured one and not have to wait on rebuilding. That's what I do. The core value of these pumps is only $100 each; meaning, that's all the credit you'll get for one. I have turned in several dead GM pumps and walked out of there with remanufactured ones, including re-winding of the motor. Even the old rust bucket of a pump I turned in...it come out of there looking brand new. I don't have the invoice in front of me, but to swap one out was around $500. To just buy a remanufactured one without turning in an old pump was around $600. At last, I have all new pumps and a spare!