In my early days, I snatched the first Kelly I saw. It was in Epsom (my least liked leather) but I figured since it was so difficult getting a Birkin or Kelly, I'll just take anything. The more I used it, the more I hated it. Took me a year to get the courage to let it go.
You know what? There are ALWAYS opportunities to buy another Birkin especially if you know your SA or SM pretty well. Being a capitalist why not sell and make some $$?