Falls River
The weapons are exactly like the basic weapons from PHB1. Basically, if Mittens and Joe feel like minmaxing their gold value of weaponry, they could loot weapons they will never use, such as an executioner's axe or bastard sword. Such weapons are also heavy and cumbersome to carry.*
*Mechanics-wise, you can either add 10 gold to your character sheet, or add 2 weapons to your character sheet, or go with "eh, I'm not gonna need to hunt for a couple weeks.", but I wasn't really thinking about mechanics here, just RP. This isn't really much of a pay day, but the guy was mostly offering weapons in case you had use for one or two that you don't have but planned to get. That said, if you sell such weapons, a normal vendor will give you half price, but a normal vendor is probably 100 miles from you. Goblin vendors will probably barter.