I've got a pair of these NRS Workboots which are basically like a cross between a dive bootie and a hiking boot. Men's size 10.
Only worn once as the size was not right for me.
I think they could be really great boots for wet caves or for someone that does a lot of work around water (apparently they are used by Navy SEALS)
New ones are $73. I'll sell mine for $45 including shipping to US.
Details and photos and such here: http://www.nrsweb.com/shop/product.asp?pfid=2338