Lowbed Trailers RFQ from Guinea

hi i am a transport company specialized in transportion of many kinds of products in west africa.
kindly give price of new or used low bed trailer to load on it construction equipment like caterpillar excavators 50tons-60tons. min.13x3x1.1height.
of course 3 axle and the price of sea freight from istanbul to conakry guinea.including sailing schedull.
if specs and price are accepted we can decide this week.
with this trailer i need used renault magnum 430 model 1998-1999.
thanks