Very hard to tell based on these pics. I have purchased 3 Stanley
planes on Ebay and have been happy with them all. It is difficult to
say for certain but I think they are about 70 years old. On Ebay you
can ask questions and even request more pictures if you like.
If you are interested in using Ebay for this type of purchase I
recommend creating an account, do a search for planes (there are lots
of them) and select 'watch this item' for 6-12 of the type you are
interested in but dont bid. When those 6-12 auctions are over you will
have a real good idea of a bidding range to use for an actual purchase.
Also, it sounds like you might want to do some reading up on planes.
There are many types for many uses. Read about sharpening them too or
you will not be happy when you use it.