Which deal is best?

I need help deciding which bike is the best deal for my situation. Beginner rider looking to get a bike for triathlon training. I am 6’2”-3”ish

1. Orange/Blue Trek 1000 Alpha for 300 (58cm)

2. Specialized Allez for 400 (58cm)

3. Red/Black Trek 1000 Alpha w/ carbon fork for 500 (58cm)

Not pictured is a Raleigh Revenio 1.0 for 200 (58cm)

All bikes are being sold as is with no accessories or anything like that. I appreciate your help/suggestions in advance!