Ok, I see that people are paying over $25/100 (that's twenty five cents a piece) for inside/outside washers.
MSC sells them for $17.29/100 (that's seventeen cents a piece) and even that's high. The local fastener warehouse in Pottsville is selling 3/8th in/outside for $0.12 cents a pop.
http://www1.mscdirect.com/CGI/NNSRIT?PM ... 2&PMT4NO=0
Look around.... the stuff is out there.