Mine's a 6.2 3L80, nothing at all special about it, and I wouldn't consider taking $10k for it, even if I were hurting for funds.
I've also driven mine all over the country (AZ, TX, NM, LA, OK, NE, WY, IA, SD, KS, MO, IL, FL, AL, GA, TN, KY, more than once) without issue. Everything works.
I...