Exchange seat reservation

I made two train seat reservations that I don’t need anymore because I changed my plans. Both are second class and are reserved on the 16th of August. I can’t get a refund for them so I wondered if anyone was interested in buying them. The first one is from Montpellier Sud-de-France (France) to Paris Aeroport Cdg2 Tgv Roissy (France), leaving at 13:59 and arriving at 17:36. I bought this one for €22,00. This train travels by Ouigo. The second seat reservation is from Paris Aeroport Cdg2 Tgv Roissy (France) to Bruxelles-Midi, leaving at 18:35 and arriving at 20:00. I bought this seat reservation for €29,00. The traintravels by Eurostar. Is anyone interested in buying both or one from me? Thanks in advance!