Just thought I would chime in with my more recent experiences with getting quotes.
80/20 does not provide any prices online and it took me a day or so to get an email back with a quote from a regional reseller. I asked about pricing for the extrusion needed to complete the 24x48 laser build viewtopic.php?f=16&t=1990
1.5" x 1.5" extrusion is about $0.40-$0.50 per inch
1.5" x 3.0" extrusion is about $0.70-$0.90 per inch
Figure $2.00 cut charge per piece
Figure $4.00-$5.00 per connection for bracket/hardware
for their Black Anodized it bumps up a little more
Black 1.5" x 1.5" extrusion is about $0.50-$0.60 per inch
Black 1.5" x 3.0" extrusion is about $0.90-$1.10 per inch
those are around 40mm extrusions
today (10/2/2013) I was looking for the rails required to build a Kossel Mini 3D printer.
KHFS3-1515-2000 $7.40 (2000mm 15mm Extrusion)
HFS3-1515-1000 $5.20 (1000mm 15mm Extrusion)
Their online cart system is ok but the price shown in the cart can be different than the price you will pay. For instance the cart said the 1000mm item was $10 but their Quote system said $5.20. I called their toll free and it was answered as soon as I pressed 2 for the sale team. The guy who answered suggested I use the quote system if I wanted an accurate price. The quote system online is connected to their inventory system, the shopping cart system uses a sometimes out of date snap shot.
I haven't ordered from either yet, but I think for the ease of ordering and price I will give MiSUMi a try first.