Control Monument Costs

I'm looking at costs of various common control markers. Principally relying on prices from the Bernsten, Surv-Kap, and Home Depot websites. 

• Wood Hubs are hard to get prices for and depend greatly on their length, and what part of the country you are in. Somewhere in the 50¢ to $1.00 range per.  Cost of tacks is nearly negligible, cost of a 3/4" mag nail is 11¢. Allowing for breakage, figure maybe $1 each.
• A 1-1/2" mag nail alone is between 21¢ and 25¢. 
• Add a stainless steel washer to it for $1.20 to $1.75, making the total cost for a MNW $1.40-$1.98. Allow a bit of cost for drilling and call it $2 each. Brass washers are much higher priced.
• The big "SURVEY MARK" spikes that emulate cotton gin spike are $1.75 each.
• Speaking of Cotton Gin Spindles, Baseline Equipment has them for 95¢ each. Not sure what the cost of shipping might be. 
• No.4 iron rods purchased in 24" precut lengths is nearly $5 a pop at Home Depot. But if you buy 10 foot lengths for $6.55 and cut them yourself that's $1.31 each. Add a plastic cap  for about 52¢ to 62¢ per. Call these $2 each also.
• 5/8" rebar are no longer sold at HD or Lowes in my area. On line search has the prices at more than double that of 1/2".  
• 1-1/8" brass plugs go for $2.95 ea. if you buy 100 at a time. Allow some cost for drilling and call them $3.25 each. I like to add some epoxy, making the cost around $3.50 each   

After that we go to aluminum capped rebars at over $10 a pop. Brass disk to be set in concrete are going to be well over $20 each.

I haven't included the cost of shipping in any of this. That's not going to be trivial.