obtainable, acquirable, accessible, purchasable, addressable, procurable, open, visible, gettable, usable, more...

unavailable, inaccessible, occupied, engaged, booked

free, paid, premium, freemium, ad-supported, ad-free, more...

total, unrestricted, other, more, 0-87083-051-1, rental, diagnostic, preparatory, complimentary, additional, forms

on call,   at your disposal,   easy to access,   up for,   at beck and call,   ready to work,   at their disposal,   at our disposal,   open to the public,   at disposal