Disputed. It spawns for $12,500 [S1] at Pilot 20, but the blueprint is listed two ways: $250,000 [BETA] on the official wiki infobox, and $200,000 [S1] on wardogs-wiki.com and in WARDOGS Hub's Season 1 guide.
Our lean is $200,000 [S1], because wardogs-wiki.com's other unlock costs match the Season 1 changelog exactly. But the changelog lists no AH-6R change at all, so neither figure is proven. Check the Pilot vendor before you save for it.