All three colors available.
Some come in "mint" condition; some are unlocked.
Others are fair condition and need unlocking.
It’s a crap shoot.
Currently selling for ~$ 300 at swappa.

I haven’t seen these in stock recently at Boost.

other models still on promotion:
https://slickdeals.net/f/9738376-apple-iphone-boost-mobile-no-contract-smartphone-various-7-from-450-6s-from-350-more-free-shipping?v=1&src=SiteSearch