hi im new, some questions

[r4tr4tr4t]

hi guys im new to the site and im happy i found it cuz it saved me from being scammed, i ran lots of searchs and clarified a lot of questions i had so im gonna ask here just the few things im still wondering
first than all im looking to buy a tag link using asian 7750, can u guys give an aproximate lifetime for that watch/movement ? how many time will pass till i have to dump it or replace a part from it ?
also i live in colombia south america, what dealer ships here ? also atl georgia works as my brother travels here in feb so he can bring it to me, that would depend on shipping prices and what works easier/less time
also based on the watch model and my location what dealer would u guys recommend me ??

thats all again congratz on the great site and thx in advance for ur help =)