First off, all appear to be cast copies or crudely made of cheap alloy.
The Lenin would be made in gold, platinum and enamels. The metal is not gold, and the enamel is either cold or painted. You can see red and grey pain in the tassels of the flag. Lenin head is pitted and not polished indicating it’s a silver colored base metal. Reverse numbering too small and incorrect. Also had well oversized rivers which have been added.
The others basically same issues with the last being completely faked and asymmetrical. Overall these are fakes of crude quality.
If this Lenin were real it is $6000-10000 or more. The others about same in the $3000 to $15000 range