Single one is a Michellin Latitude Tour with 4-5mm.
Second photo Accelera 3.5 - 4mm tread left. Both tyres have more wear on the right hand side pictured (ran slightly under pressure I think), but are otherwise in good condition - passed an MOT with them with no advisories.
Third photo Forceum 2.5 - 3.5mm tread. They have a slight bit more edge wear than centre as shown in the picture
Heres my two bobs worth in why they ain't selling and I have 255 55 18's on my disco
Not a lot of tread left on them and what is left is worn unevenly
Also
I just had part worns fitted, i had originally bought them new and then didnt like them but come MOT time the ones fitted were quite worn.
Had to pay £40 for the fitting and balancing and for that reason don't think it would be worth buying yours.
Again though only my opinion