It's actually based on upgrade costs, according to the pricing page it's $99 for UBBSystems. Myself I charge $120 for an upgrade and I include porting up mods that you have installed (within reason, as long as they're compatible)

I am a Web Development Contractor, I do not work for UBBCentral. I have provided free User to User Support since the beginning of these support forums.
Do you need Forum Install or Upgrade Services?
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