Sigh.

I thought I was close enough to sealing this deal. This person gave a bad, bad (very bad) headache today.

It all started in August last year up to today. It has been almost 5 months of negotiating. I almost threw my phone to my computer screen when he starts to yell at me on the phone and screaming "What the hell! What the hell!". 

Perseverance.

And dear customer,

Yes, I understand. I shall meet you one day and hand over 3 keys to you.