Silkroad Online buying, trading and selling. Advertise items for sale, or post if your looking for something special. Don't forget to list your server.
I find them hard to sell, but the +3 INT should help if you find the right person. Still, I doubt you'll get more than five times what you get if you sell it to an NPC.
This is the way I calculate prices:
My base price for selling: 2 x NPC selling price (meaning the money I get if selling it to an NPC)
+1 = 1 x NPC selling price
INT +3 = 2-3 x NPC selling price
STR +1 = 0-1 x NPC selling price
This would add upp to between 5 and 7 x the NPC selling price.
So for an item you get 5k for when you sell it, I'd price it at 25-35k.
I find that this gives me a nice balance between profit and stall time (the time I have to have my stall open to sell my items).