I started collecting kinda late in life Part of retirement I guess. I have some items Mac and Cornwall socket sets My grand pa worked for Firestone I have some breaker bars and extensions 1/2 and 3/8 drive  but Have know idea what they are worth or where I can find more to complete the set.
Any ideas are welcome.

Welcome to Tool Talk.

You could search the For Sale Forum here to see if any were offered here.
Best bet is to search Ebay Sold Items to see what people actually pay for the tools you have.