Data on Purchase / Sale Activity .. say in California

[Pramod Yash]

I am a data nerd with solid data analysis skills. Can you recommend sources from where I can obtain rich data on purchase / sale?  Many thanks, in advance.

Data points I am looking for:

a. Address of unit

b. Same unit purchase and sale price, in time

c. Buyer / Seller Info

d. Date of transactions on unit

e. Whether listed on MLS

f. Type of unit - SFR, Condo, Small Multi