The most expensive one listed on tractorhouse without a FEL is asking $7500 with unlisted hours and a bad paint job, but I think that's a very optimistic price. Of course, that's just an asking price, not what they will end up selling it for. Interestingly, these tractors without a loader suffer quite a bit in the used market. I think most buyers are looking for a FEL equipped tractor.
Any chance you can buy it? It could use the same implements as your 3130 for the most part, it'll save you time swapping them out, and you'll think of your friend while you're running it. You might be able to find a price that would work for both of you. Maybe offer her $5-6000 plus whatever you can get for selling any attachments you don't need. I think she'll be lucky to get much more than $6000 on the used market, and seeing it go to a friend might be worth something to her.