Thanks again!
I do appreciate it.
I appreciate more than I can say.
I must thank you again for your generous help.
My true gratitude is beyond the word’s description.
I feel most obliged to thank you once more.
I am most grateful for your selfless donation.
Please accept my gratitude as always.
Best wishes for your health and every happiness.
My thanks to you for your kindness and assistance when I …–and my love for you, always!