Domain valuation

I have 5 domains that im not doing anything with, could anyone tell me if they're worth anything

dotdkregistry.org
ipagereview.org
megasearchbar.com
seolinkbuild.com
zrodegree.com

thanks

ipagereview could get you into troubles for copyright / trademark infringement. I would drop it if I were you (so, it's worth nothing IMO)

seolinkbuild.com could be used as an SEO services type of website. It's probably worth $100-200 (at least that's what I'd pay for it, and only because of the niche, otherwise it wouldn't be worth much without a website, traffic, rankings, and revenue)

The other 3 domains I won't speak about because I'd have to do research and I'm not in mood for that. But again, if they're just domain names (without a website, or history behind them, or without backlinks, traffic, etc.) they're worth nothing special (only the renewal price, if even that)

They are just domain name unless they are developed and optimized.
If you want to have better price for selling them - try to develop each of them.

Even after having defined their value, there is always the problem of finding a buyer who offers you that amount.

Let them expire please. Worth nothing.