Reusing rj45 110 keystones jacks on patchpanel

I am doing an install – moving a company from one location to another – and the company wants to reuse its Lucent patch panel – it is the kind with the jacks that pop out. I am wondering whether I can reuse the jacks themselves – they are 110 – I pulled the wires out of the jacks that are currently not being used – the connectors look to be in good condition and do not appear to have been damaged by the punch down tool. It is possible to reuse these or is it frowned upon? Thanks for any help you can provide!