you pay for quality. I purchased a pair of rubber/neophrene waders from a Chandlers in France, (sea fishing outfitters for about 100) and they alsted about 6 years, Ithen purchased a cheaper nylon pair for about 30 and they lasted a year and where rubbish. Worth while looking at Chandles shops -hope I have spelt in right.
I've had some Snowbee ones for about 5 years and they're still going strong. Thought the felt soles would wear out very quickly but have been pleasantly surprised. I think I got them from Carillon at Bawtry near Doncaster.