Below we provide condensed clarity on pricing for common assemblies and components. 

Ecommerce shopping carts are good for some things, but not necessarily for conveying a myriad of combined products that you need to see and understand before you can place an order and those where they may be additional options. 

Old Fashioned Catalogs, PDF documents , and now Google Docs are often better ways to list engineered systems -- and this is a start on those --  and then we'll try to  implement a cart as things stabalize. 

4 Axis Bracket and Sidewinder vs the Double Sidewinder

The  4 axis bracket and sidewinder combo should be thought of more as an "adjustment bracket and support".  It's less convenient than the doulbe sidwinder and the 4 axis thumb nut often requires a pair of pliers for final adjust.  This is good if you already have a 4 axis bracket and just need a little more and you can bring the cost down by providing your own lesser beefy brackt or furniture connector jus for push support. 

The Double Sidewinder Bracket is beefier and does not require plyers to loosen and tighten the nuts sufficent to hold larger loads. 

Both can work for generally the same needs. 

Telescoping Post Pricing

14" Telescoping Post Assembly  - $15
16" Telescoping Post Assembly  - $16
17.5" telescoping Post Assembly - $17

Each Telescoping Post Assembly comes with ( 2 posts, 1 telescoping coupling, 1 end coupling,  2 end caps)

Tube Pricing 

1/2 EMT - up to 17.5" - $5 ea (standard stock is 14",16", 17.5" )
1/2 EMT - 17.5" to 30" -   $6 ea (shipping costs are proportionally higher) 

3/4 EMT - up to 17.5"  - $6 ea (standard stock is 14",16", 17.5" )
3/4 EMT - 17.5" to 30" - $7 ea  (shipping costs are proportionally higher)

Fittings

Telescoping Coupling   - $4 ea
3/4"  EMT coupling drilled and tapped with  thumb screw for one screw

1/2" EMT End Connector - $1.50 (not modified)

1/2 x 2" Schedule 80 Nipple - for  direct mounting 3/4" Post  $1.50  (NOTE: Telescoping Coupling also required) 

Plugs

1/2" and 3/4" plugs      $0.50 each

8" Tubular Base - $14

For 1 or 2 monitors up to 22" with 3 or 4 axis brackets
Includes:

1/2"  5 way cast iron elbow (painted black is standard) 

 8" schedule 80 pvc threaded nipples (x2) (dark grey is standard)

 1/2" cast iron elbows (x2) (painted black is standard)

Felt pads (x4) (black is standard)

6" Light Weight Base - $8

For 1 moniitor up to 22"  with 3 axis bracket only  or other light weight applications

Includes:

1/2"  5 way pvc elbow ( black is standard) 

 6" Polyethelene threaded nipples (x2) (black is standard)

 Pipe caps (x2) (grey is standard)

Felt pads (x4) (black is standard)

NOTE: one of several low cost, nonlisted adapters required to mount the metal post to this PVC elbow. Ask if that is the intention (and we'll post details later).  Accepts 1/2" pvc for post with no other parts.