The exact word geek sold for $498 in .top and $525 in .nyc so I would see the value as somewhat in that ballpark. In the .name extension it only got $50, but names in that lately don't go for much. The .me sold for $1500 but I would regard that as more valuable. The .com sold for more than $25,000 according to GoValue (not sure when, it's not in NameBio).
The name is potentially very useful with subdomains - i.e. could in parallel run things like
crypto.geek.xyz
blockchain.geek.xyz
IOT.geek.xyz
nanotech.geek.xyz
domain.geek.xyz
If it was mine, I would try to get low $$$$ for it, but accept anything over mid $$$. Best of luck with it!