What a tough decision!
Personally I love red bags and that bi-color Jyp is lovely.
But.....your green is wonderful too!
If I were you...I would keep the green for now and wait until you have no more hesitation....
I like the look of the Menthe better and I'm also not a fan of buying/selling quickly, but reading your post on being afraid of colour transfer alters the landscape a bit. If you're not using the Menthe, but would be willing to use the bi-colour, then I would go for the bi-colour that has more practical value.
I guess if you are not using the Menthe, then maybe get another dark color? There are alot of great dark colors coming this fall, like graphite, ecorce, etc. I don't like this bi-color too much. Red is not my first choice for color for Jypsy personally. I would choose something like grey or blue.