I've been in Sailorman many times and yet have to see a bargain there. Much of their used stuff is priced the same as new. Just to make sure of my impression of their pricing I just did a small check - they wanted $95 for a used 44#
claw anchor that can be had new at many
marine stores for about $100. When you walk around the store it's easy to get the impression that you're getting a deal but make sure you know the normal retail
price of an item before you buy a "bargain". If you're seriously looking for stuff at used
marine places it's a good idea to take a couple of catalogs from large retail outfits with you so that you can make a quick price check.
As for chain here's where I get mine.
BBB* Windlass Anchor Chain
It's more economical to get half a drum (275' $3.31 per foot, free freight) so try and find another
boat to share the
purchase with.