I had a customer place an order probably 4 months ago. I told him 2 months to completion. I finished on time. I generally email a customer when I start their knife, and I did so in this case. He wasn't too communicative, so I emailed him again before I attached the mammoth scales he wanted. He said still OK. Now it's been about 6 weeks since the first time I sent him pics and said the knives were done. He first replied that he still wanted them but was having money trouble. He hasn't replied to two further emails. He's a previous customer that I traded a knife to for some antler. How long should I hold on to his knives before I give up and post them up for sale?