Gentleman retiring, need ideas for a SysAdmin retirement geek gift.

So one of our long time, around 35 years, sysadmins is retiring. My entire IT office is on charge of various gag or nerd gifts for him. I am just not sure entirely what Might be a decent idea for someone that's been doing this longer than I've been alive.

That being said I look to the many people here for help, in locating an item you guys like or tweak or want on your desks.

He enjoys Hak5, Defcon, RaspberryPi, Whitehat and Blackhat technologies. He is versed in everything from MS-DOS to 2008r2 and all clients between then and now, as well as Debian, and Redhat setups. Solaris and Cisco ios to some degree. He and I enjoy discussing homelab setups, upcoming technologies and various nifty gizmos for network security we use at home and work.

Given all this info, what might be something you think he might enjoy, be one or many things no more than about $200 unless it is perfect.

I've been thinking and will do recon at his place when we have lunch together there tomorrow.

Thanks Gentlemen and fellow SysAdmins!

Should add that he has definitely done his time and will fight for both necessities and people that do well by him or the company. So we want him to feel both appreciated and respected.