it too much and are not looking to use in a power hungry rig.. This can easily last you 3-4 years more ...
Check this thread
PSU to replace my Corsair VX450W ... | TechEnclave - Indian Technology Communit
3 members have 9-10 year old VX450 working good... don't sell it , it might even last you more than your Vs450... and if you do sell it , that PSU would sell for a lot more