I think mpst agents will accept your price....if they don't go elsewhere.
Off topic a little there is a Facebook group "French Property For Sale Under 50,000 Euros"
It might be worth posting it there with the proviso that any visits would be done by an agent..
The fact that an opinion has been widely held is no evidence whatever that it is not utterly absurd; indeed in view of the silliness of the majority of mankind, a widespread belief is more likely to be foolish than sensible.
- Bertrand Russell