If any of them have the angled metal clip attached to the bail they are very late period...80's to 90's era.
Not a huge a value there. The camo covers, in your photo, are also very late period woodland camo. Not much value there either.
If the tin pots are in decent condition and do not have late period paint and straps then value goes up dramatically.
A complete set assembled as pictured may have some value though not a huge amount
A few years a go I found an MP painted lid, in Korean lettering...turned out to be a Marine Corps unit stationed in Korea assigned policing duties. Paid just under 800 for the set
Both the lid and liner were painted and both were fitted as per WW2 specs. Over the past 25 years of searching for good WW2 pots and liners I have seen more of these then I care to mention. There are a lot of real good ones out there and a lot of trash. Prices have been creeping up steadily and now a clean WW2 all original piece with a generic high pressure liner is approaching 300. Add a rare liner and the price goes ballistic. Just recently I acquired a stone cold mint Hawley Fiber liner (Ultra rare in this condition)...had to pay 4 figures for it and that was with no tin pot. A few years ago I found a pair of lids with liners and camo covers exactly what you have pictured and paid 50 bucks a piece, which at that time was top end for them. Not much difference today for the same thing.
The best piece in the group is the USMC cover, again late era. A closer examination of the construction of the cover would be needed to determine value though.
They are cool lids and basically look complete though one appears to be missing the chin strap.
