delete some comments, delete onEnter function, buy button will disappear when time is up, price is not allowed to be negative
delete some comments, delete onEnter function, buy button will disappear when time is up, price is not allowed to be negative

DoctorTeeth/elm-dynamic-pricing-demo,DoctorTeeth/elm-dynamic-pricing-demo,DoctorTeeth/pricefly-demo,DoctorTeeth/pricefly-demo,DoctorTeeth/elm-dynamic-pricing-demo,DoctorTeeth/pricefly-demo