Not looked at the link, but surely you have something in your vast wardrobe that you could use, thus saving you money - as you mentioned in another post that you were worried abou money with Christmas coming!
The dresses seem to be in someone's bedroom. Perhaps they are for sale on Marketplace (facebook) or is it your bedroom ? Take care when buying items on that site as there are scammers around. Don't give out bank card details. Suggest cash on collection.
I prefer the red, but it looks like the sort of dress that would be worn over leggings. You're a nice slim lady and I'm sure one of your other shapely dresses would be better as these are rather frumpy.