Hi sergio,

Tought here, change your electronic supplier... go at www.digikey.com and see the price difference between those two device

MAX487CPA : 3,87 $ USD
SN75176BP : 0,93 $ USD

far from 10X.

If you're going to say that you can drive 128 node with 650 uA of current drive those do also the job

MAX483CPA :650uA
DS485 :900uA
SN75LBC176P : 1.5mA
SN65LBC176P : 1.5ma

and such.