Hello Karin!!!
Welcome!!!
Please keep in mind that these appraisals are only educated opinions...Life can be weird! I had a domain sell this week for $$$$...that I thought was trash/mistake lol...someone wanted it! So sometimes you just never know!
1.) networkers.info
network is a great tech word. The good news is that 366 network domains have been bought since Jan. 2019...but the bad news is they are not going for a lot. Even worse news is that of the 366 network domain sales...none of them were .info.
The average price is $300 with a .com ending.
So imo I am going to say this is worthless.
2.) food - very popular word over 520 domain sold with food since Jan 2019. Average price $800 for a .com
There is a lot of usafood domains for sale on sedo right now...the big fish are going to go for the usafood before usa-food first. I am going to say if you hang onto it until long enough...these domains will be sold and then yours will be more valuable. I would sit on this for four to five years and let it go up in price and then revisit its worth.
3.) american food. store (same advice as above) sit on it and wait five years.
4.) smart-contracts.icu Right now I would say this is worthless imo. Great smart domains are only going for $300 - $500 and they are .com's Also this has the dreaded (-).
5.) four word domain...I found some comparisons
blockchaindailynews.com $700
blockchainsmartphones.com $150
theblockchainrecruiter.com $128
Right now you are competing against blockchain.() and three word blockchain domains. imo this is worthless. (I would not even sit on this.)