Upgrading Some Sets

I am new to these boards, but after putting together some sets I am finding it hard and expensive to upgrade and decided that maybe this would be a good place to start. I am interested in trading for raw and graded football. I am not sure how this works and any advice especially on trading raw cards would be appreciated. I am sure this has been addressed in an earlier post, but I could not find it. Thanks in advance! I am currently working on 1969 Topps, 1966 Philadelphia, and 1973 Topps.
Registry Sets:
T222's PSA 1 or better
T222's PSA 1 or better
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Comments
Bosox1976
T222's PSA 1 or better