Keep them matey.
I still remember the toys in the very early 80's...the big Voltes V, Mazinger Z, Grendizer....(shows my age ha ha ha) I had most if not all...and at age 6 I don't know how to handle it,...broken this and that....the rest is history.
Now my point is (just like the others here) you are in a position not to suffer most of our fate....you can keep them and later on, say after about 5 to 10 years if you still feel the same, sell it. I doubt it though. Collectors tend to have a cyclical appetite for their respective collections. Believe you US you will not regret keeping those toys!