After all that effort of cleaning R2 you owe it to yourself to keep her a bit longer. 204 prices are still relatively high and I'd advise if you were wanting/needing to change imminently that a better change would be to a 211, not a 204.
Don't get me wrong, the 204 is a lovely car, but not as good value as a 211 at the moment. R2's value won't drop as much relatively, and absolutely, in 12 months than a new(ish) 204. I'd hold on another 6-12months when 204's are a bit cheaper and the cost of change a bit lower.