Charles Bukowski - American author

Can anyone find the copies sold during the 70's of his first novels- namely Post Office, but also Factotum/Women.

I can see Buk lived very moderately up until the early 80s and was wondering about how much/distribution(would it have been found in the big bookstores of the day - or was it a book that sold say....in that 20-25,000 region - including Europe).

Without gettng into the whole Martin arrangement financially, just wanting to get an idea of number for a niche writer during that time such as Bukowski was considered by many.
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