you should keep him/her!!! i love the name spencer! it is too cute!
AWW what nice markings. You are very lucky you found the tiel when you did i think. I just got two tiels. I feed mine small parrot food and veggies. they dont really like the veggies but they love sunflower seeds .

I would suggest you putting an add in the found section of the paper and if you dont get a reply that is legit, then keep him/her!!!!!