I just listed my Arkel GT-54 set complete with rain covers and shoulder strap on eBay. If anyone is interested, the eBay page is:
I chose to do it this way because everyone gets "Buyer Protection" and you get to see my eBay history (100%) so the transaction should feel better all around.
I started the price at $225 for the panniers, covers and strap.
These were used only for one trip from South Florida to St Augustine then for a trip on the GAP from Pittsburgh to Cumberland and back. Total of about 600 miles on them. Never in the rain without the covers.
They are in GREAT shape.
Sell via PayPal only and ship ONLY to the USA.
I also have a similarly great shape Arkel Handlebar bag and an unused Arkel Tailrider Trunk Bag I'll be listing soon.