Why we publish the prices
Because you are trying to work out whether this is worth doing, and you cannot do that without a number. The traditional approach, where you fill in a form and wait for someone to call you and qualify you before revealing anything, wastes a fortnight and mostly exists so the price can be adjusted to what you look like you can pay.
These prices are the same whether you are a two-person trade business or a national brand. If your situation genuinely does not fit a standard format, we will tell you and price it properly, in both directions. That happens, and it is a conversation, not a negotiation.
What we will not do is quote a build price from a website. Custom integration work depends entirely on your systems, your data and your processes, and anyone who quotes that without looking is guessing with your money.