Hello tkapoutsis, welcome to Stamp Community!

They mostly look like Local Post stamps, sometimes known as a part of Cinderella stamp collecting, made for companies delivering mails outside of Post Office bounds or times, or just made to cover times when there was no Post Office delivery or just to have a fancy stamp for the pleasure of it.
Some names are also from England or Scotland or Germany as well as the USA.
Some of these have been discussed before here on Stamp Community (SCF) so doing a Search for Local or Blood or other names may help.
Here is a thread / topic about Worlwide local stamps:
https://goscf.com/t/1596&SearchTerms=bloodsI am not sure of costing. Perhaps search
ebay or Delcampe for asking prices?