"I take girl, I keep girl?" Best to get that straight. You don't want to refuse a partnership here for just one piece of tail. Now a lass who will be there in the morning for as long as you want is quite another thing. [And best to keep up the dumb act. If they have to explain to the stupid barbarian, they can't cheat him.]
"That's right. Take whichever one will make you happy, and you will make happy. You have saved my life, but I may not be able to stay in business. If so, I will have to sell my girls, and whoever you take, I think you will be better for her than whoever might buy her.
"Like to look them over? With the mess those...gentlemen... made, we will not be open for business and they will be able to explain the advantages of owning them to you."
"Sound good. Start with blond?"
The blond is dress in an amazon outfit, or rather maybe half of one. She's tallish, if hardly in your league, and slender, tho definitely not skinny. She carries a real sword rather than some toy. She had been standing in front of the other girls trying to defend them when you barged in. [You don't think she really had much chance, but she had been trying.] As you inspect her, she stands almost at attention, and announces "I'm Ainia. I was born in Amazon territory and was on the losing side of a battle. I was eventually sold here. I serve as bouncer here when I am not serving the johns."
Her serious manner is a contrast to the next lass, who cheerfully jumps into your lap and cuddles up against you. "I'm Barbara. My parents were the poorest of the poor, and they had seven daughters who needed dowries they could not get. So I volunteered to be sold here, and now all my sisters are, or will be, honorably married because of my sacrifice. Which really isn't much of one. I am very good at making men happy, and quite enjoy my work." Her snuggling up against you seems to confirm that.
The third lass is the cleric who healed you. She's a dark brunette, but she is wearing a lot of makeup to look light, and her hair is dyed to appear blond. What little she is wearing is pure white. She bows to you respectfully. "I am Peace, a cleric of Sune, which should tell you my work here is not shameful. If not, I will be happy to tell you the teachings of Sune.
"Despite Sune not approving of slavery, I became one when I loudly and vigorously backed an idea I thought would benefit the church. I vowed I would do whatever I could to guarantee we did not lose a copper. Sadly the idea lost a good deal of gold, and I was held to my promise, and eventually ended up here as a slave. Besides my regular duties, I make sure the girls and the Johns stay healthy."
The other girls advance and introduce themselves, tho they somewhat blur together. You start considering their merits. You could use somebody to guard your flank as well as warm your bed. Ainia would be quite useful. But so would Peace. Barbarians like you get hurt a lot, and having Peace to cure you would be very nice too.
Barbara might not be so useful, but she would definitely make your life worth living, very much so. Even if you starved to death with her, you would die with a smile on your face. And each of the other girls have their own virtues. Which to choose?
Well, at least the girls are grateful for their rescue, and happy to let you have a full investigation of the merchandise.