Buyer gets the pump pictured. True open box, totally unused. OBVIOUSLY Unused. Comes as you see it so: no screws to close up the plastic cover. I imagine those are easy to find and the actual knob switch thing is not there. I have priced this accordingly. If you see the price go up I probably found a switch. The buyer gets what is pictured so please check the pictures carefully. 

Bottom line:

Satisfaction is guaranteed or returns are free with a couple of stipulations:  
1) if you have a problem you must make an effort to contact us before leaving feedback....if you can not commit to that then shop elsewhere   2) If a free return with a 100% refund might cause you to pitch a fit please than please shop elsewhere.  
If the above stipulations make you not want to buy our stuff I am truly sorry but we are a low drama operation.