Barnet have released 13 players following their relegation from the Football League.
Barnet boss Lawrie Sanchez was disappointed after Shrewsbury left Underhill with a 2-1 win following another bad Bees performance.
Graham Turner heaped praise on Shrewsbury after a James Collins goal saw off Barnet 2-1 to leave Town just two points off the summit.
Plymouth boss Carl Fletcher took plenty of positives from the goalless home draw against Barnet.
Barnet say they have "reluctantly" turned down an approach from Cameroon for defender Clovis Kamdjo.
Barnet have handed young defender Clovis Kamdjo a new contract following some good progress during pre-season.
Barnet have been handed a boost with the FA upholding their appeal against Clovis Kamdjo's red card.