I found a guy nearby that has "lots of boat parts" for sale on craigslist. As I am new to boating and have purchased, ive been told, a white anchor, my question is this. What parts should I pickup to keep on hand for the white anchor? I am going for the manual fuel pump 35.00 and flame arrestor 10.00. He says he has complete lower units for my OMC,whats a reasonable price for a complete one and what do I look for as far as damage?