"Hi mate. How much for a simple sign? Nothing special - just like, a few different fonts and some different colours. I can supply the board - I got one cheap off eBay see". – at Pencoed, Wales
I’m no Alan Sugar, but you can often see the ones that’ll have a really short shelf life. Shoddy signage is often just the most obvious symptom, but you’ll probs see more of why they’ll not last inside...