I finally bought mine from Amazon today. I need them for remarking the formal beds and a remake bed soon!
And a permanent oil based artist ink Sharpie (which is suppose to last (- $5)
6 inch cost the same as 5 inch and the price changed this week. $60 for 1000 including shipping
They are strong though and last several years.
The thinner ones snap in the cold spring when I try to push them back into the ground after frost heaving.
Hope this helps.