used metal detector

I've got a place that I can purchase an unused demo unit Bounty Hunter Pioneer 505 (8" Coil) for $200 or I could buy a new Garret Ace 250 with the Kellyco free accessories for $212 Which one should I get? (New to the hobby btw so feel free to offer anything like detectors or advice) I'm in...

Garrett AT PRO Detector, Great Condition $489, with 8,5 x 11 coil PRO Performance DD ,no headphones, printed user guide from PDF, PM me if interested i am in California , North County San Diego (Free Pick Up from 92007), I can ship it but you pay for shipping ( $19.95 shipping UPS with...