Custom offers (or quotes as we call them in the US) can be the kiss-of-death for Sellers if not done properly.
To avoid losing money or receiving a bad review you should consider the following:
Don’t rush it. When you rush to get out a quote you will inevitably overlook something.
Ask plenty of questions of your potential Buyer. In the course of asking questions you will uncover hidden details that you’ll want to factor into your quote. And by asking questions you are indirectly educating your Buyer and establishing yourself as an expert, all of which gives them confidence they’re making the right decision to purchase from you.
Know your value. Your skill set took time, energy and money to develop to the point you’re at. Have a standard hourly rate based on your skill set and experience and build the quote upwards from there.
CYA -Custom offers are a binding business contract. Make sure you include everything in it before you hit the submit button.