Amazon sells a 555 on a card with all the parts, including 2 pots and a set of plug headers to select the RC networks for a free running square wave time base for a couple bucks.
1hz to 200kz

http://www.amazon.com/gp/product/B0...=true&ref_=oh_aui_detailpage_o03_s00

It is a lot easier than trying to assemble all of those parts on perf board. I doubt you could get them for the same money loose.

Greg Fretwell